EP0856702A1 - Gas cooking device - Google Patents

Abstract

Glass or glass ceramic top (2) forms the cooking surface of a gas cooker with at least one gas radiant or atmospheric burner. The top is fastened in a frame (8) and is bent at the edge (2a), forming an opening (8a) acting as a guide for exhaust air (7) for radiant burners or for incoming air for atmospheric burners. No grid is bonded to the opening. The top can be bent upwards or downwards and preferably extends only over l part of one edge, centrally or apart from the centre. The bent edge may contain several circular recesses arranged in a line.

Description

The invention relates to a gas cooker with at least one gas radiation or atmospheric burner and a glass or glass ceramic plate as Cooking surface.

Gas cookers with a glass or glass ceramic plate as the cooking surface are in two versions on the market. One version is for heating Radiant gas burners are provided, which together with primary air supplied gas on the surface of a porous ceramic Burner plate is burned. One or more such gas radiant burners are arranged at a distance under a common glass ceramic plate, the is glued into a hob frame. Every gas radiation burner defines a cooking zone on the top of the glass ceramic plate. Below the Glass ceramic plate, an insulating part is also provided, the recesses for the gas radiation burner and exhaust air ducts for the discharge of the hot exhaust gases of the individual burners, which are in a common, elongated Outlet, which is below the hob frame, which in this Area grid-like ventilation slots for the exit of the hot exhaust air.

A gas cooker of this version is described in DE 43 26 945 C2. This known gas cooking device does have a blower that air from the outside to the burners and additionally cools the exhaust gases via a bypass as well as an air guidance system installed on the outer walls Prevents increased temperatures on the housing wall, but causes the Construction of the exhaust air duct that the hot exhaust gases first on the Connection point between the glass ceramic plate and the hob frame Swipe past and only then be mixed with cold air and pass through the outlet openings in the ventilation grille. This leads to a considerable thermal stress on the adhesive bond between the Glass ceramic plate and the hob frame, which is also in the area of Ventilation grille must be present because of the overflow protection. By Baffles or the like could reduce the thermal load be, which would lead to additional assembly costs.

Another disadvantage is that ventilation grilles are not special are easy to clean, tarnish colored and that too Disrupt the overall appearance of the gas cooking appliance.

In the second version of gas cookers with a glass or Glass ceramic plates as cooking surfaces are atmospheric burners, i.e. burner with open flame in corresponding openings in the glass or Glass ceramic plate integrated. Need with the first version with Radiation gas burners the exhaust air of a special guide, so it happens the second version with atmospheric burners on the feed of Primary air, i.e. the supply air. For standing stoves after the second version the primary air is supplied in a known manner via ventilation slots, i.e. via appropriate ventilation grilles in the stove or switch panel area. This concept has the disadvantage that the ventilation grille in terms of Cleaning, as mentioned above, is problematic. At Built-in hobs according to the second version, such as those from the DE 195 05 469 C1 have become known, however, is one Primary air supply via corresponding cutouts in the floor panel at least not easily possible. Therefore, in the known case Cooktop level, i.e. either between the glass ceramic plate and the associated frame construction or the angled control panel elongated opening provided for the air supply, the hood-like is covered. This conception of the primary air supply has the disadvantage that only a relatively small overflow volume can be collected, so that the danger cannot be excluded that through the supply air inlet opening Overflowed cookware gets into the interior of the bowl and soiling of the electronics / electrics contained therein. But also with the Care and cleaning of the cooking surface can result in the passage of liquid media, e.g. of cleaning materials with corresponding disadvantageous Consequences.

The invention has for its object in the above Gas cooker the opening and the associated guide once for the Exhaust air from gas radiation burners is thermally unproblematic because there is no adhesive connection and yet protected against overflow, and on the other hand for those Supply air in atmospheric burners safely protected against overflowing Cookware and cleaning materials as well as easy to clean overall to train.

This object is achieved according to the invention by a gas cooking appliance with at least one gas radiation or atmospheric burner, a glass or glass ceramic plate as a cooking surface in a hob frame is attached, and which is partially bent from the cooking surface level, and with an opening and an associated guide for the exhaust air Radiant gas burners or for the supply air to atmospheric burners ventilation grid free in the bent area at a distance from the cooking surface level and at least as an exhaust opening without an adhesive connection between the glass or Glass ceramic plate and the hob frame is formed.

The area according to the invention is the area of the glass / glass ceramic surface with the opening for the supply and exhaust air just as easily clean like the hob itself. The bend of the hob offers effective overflow protection and protection against the ingress of Cleaning liquid or the like. In the supply or exhaust air opening. Since in Area of the exhaust vent is not an adhesive connection and the materials in the exhaust air opening is in this area which can be subjected to high thermal loads anyway thermally unproblematic according to the invention.

The partial bending of the glass ceramic plate on the cooking surface Gas cooking appliances are known per se from DE 43 33 334 C2. in the In the known case, the bent area forms a switch panel Openings for controls and displays. Openings for access or Exhaust air is not formed by the bent area because it is like the cooking surface part itself is inserted tightly into the hob frame.

In connection with induction cooking appliances with a glass ceramic cooking surface as a conscious alternative to glass ceramic cooktops Radiant heaters are also known from DE-U-295 00 051.1. the glass ceramic plate forming the cooking surface to form a Air outlet between it and the hob frame in the rear Turn part. The bent area is with the hob frame cushioned by silicone pads and in the air outlet is one Exhaust air list instead of a grille, i.e. a ventilation grille is provided.

Such a design of the air outlet as an exhaust opening for a Gas cooker with gas radiant burners would be due to the silicone toppings thermally stressed and therefore unusable in practice. Furthermore, would the exhaust air list is heavily attacked by the hot exhaust gases (factory start-up), apart from the fact that this is not particularly easy to clean anyway. she is on glass ceramic hobs with induction hobs to remove the Heat build-up below the glass ceramic plate with a relative low temperature in the exhaust air and is not for the outlet of very hot combustion gases, as in the case of gas burner hotplates, suitable.

According to a first embodiment of the invention, the glass or Glass ceramic plate is bent upwards out of the cooking surface level. This configuration offers particular advantages in the case of training Opening for the discharge of the hot exhaust gases as they are natural Convection supported. This configuration also offers a good one Overflow protection.

According to another development of the invention, the glass or Glass ceramic plate is bent downwards from the cooking surface level. A Such a configuration becomes useful for an opening for feeding Use fresh air with open gas burners, as the air is cooler is sucked in.

For the design of the bent area there are a number of Possibilities available, which depend on the necessary air flow, the manufacturing possibilities, but also significantly after the Straighten design. So the turning edge of the area, and thus the Area itself, extend over an entire side of the cooking surface. There are but also embodiments of the invention are conceivable in which the Bending edge of the bent area only over part of the side of the Cooking surface extends. The bending edge and thus the bent area can be centered or off-center, depending on the desired Design.

Also for the training of the opening and the related leadership for the supply or exhaust air are a number of developments of the invention possible. So the gas cooker can be designed such that between the Edge of the bent area and one edge of the device an elongated Opening with a guide for the exhaust air outlet or the inlet air inlet is trained.

The device edge can be the hob frame, an area of the Appliance housing or an area of an adjacent cooking surface in combination appliances be.

Alternatively, according to a further embodiment of the invention of the angled area at least one recess as an outlet opening designed for the exhaust air or as an inlet opening for the supply air, the Hob frame includes the edge of the bent area. Also The design requirements and wishes play a decisive role here. The invention enables a wide range of Options. For example, several circular arranged in rows Recesses may be provided. One is also aesthetically pleasing Development of the cooking device according to the invention if a central linear Recess is provided, the depth of which is only part of the depth of the bent area extends.

There are particular advantages with regard to exhaust air routing if according to a further development of this concept, the glass or glass ceramic plate is bent over two bending edges, such that the second is bent Area extends parallel to the cooking surface and the recess records.

Further configurations, possible applications and advantages of the Invention emerge from the description of in the drawings illustrated embodiments.

Fig. 1

in einer schematischen perspektivischen Darstellung ein Gaskochgerät mit Gasstrahlungsbrennern und einer gemäß der Erfindung ausgebildeten Abgasöffnung,

Fig. 2

einen Ausschnitt aus Fig. 2, im vergrößerten Maßstab, mit einer Schnittdarstellung der Abgasführung,

Fig. 3

ein Gaskochgerät entsprechend den Fig. 1 und 2, jedoch mit atmosphärischen Brennern und einer gemäß der Erfindung ausgebildeten Zuluftöffnung,

Fig. 4

in gebrochener Darstellung einen Ausschnitt aus dem rückwärtigen abgebogenen Teil der Kochfläche mit einer mittigen Aussparung im abgebogenen Bereich zur Bildung der Zu- oder Abluftöffnung,

Fig. 5

in gebrochener Darstellung einen Ausschnitt aus dem rückwärtig abgebogenen Teil der Kochfläche mit zeilenartig angeordneten kreisförmigen, die Zu- oder Abluftöffnungen bildenden Aussparungen im abgebogenen Teil,

Fig. 5a

eine Abwandlung der Ausführung nach Fig. 5, bei der die Glaskeramik-Kochflächenplatte über zwei Kanten gebogen ist und die Aussparungen im waagrechten, zweiten abgebogenen Bereich ausgebildet sind,

Fig. 6

eine Anordnung entsprechend Fig. 2, jedoch mit einer rückwärtig ausgebildeten Abluftöffnung,

Fig. 7

eine hinten mittig teilhochgebogene Glaskeramikplatte der Kochfläche,

Fig. 8

eine hinten seitlich teilhochgebogene Glaskeramikplatte der Kochfläche,

Fig. 9

eine frontseitig und außermittig teilweise nach unten gebogene Glaskeramikplatte bei einem Standherd für atmosphärische Brenner, unter Bildung einer frontseitigen Öffnung für die Zuluft,

Fig. 10

eine frontseitig mittig nach unten abgebogene Glaskeramikplatte unter Bildung einer frontseitigen Zuluftöffnung, die gleichzeitig einen hinten seitlich teilhochgebogenen Bereich unter Bildung einer Abluftöffnung besitzt, angewendet bei einem Standherd der sowohl mit Gasstrahlungsbrennern als auch mit atmosphärischen Brennern ausrüstbar ist,

Fig. 11

eine Einbaumulde mit einem Elektroteil und einem angrenzenden, versenkt angeordneten Gasteil mit atmosphärischen Brennern, bei denen die zugehörigen Glaskeramikplatten, beabstandet gegenüberliegend, zwei rechtwinklige Abbiegungen unter Bildung einer Zuluftöffnung für den Gasteil aufweisen, und

Fig. 12

eine der Fig. 11 entsprechende Gerätekombination, ausgebildet als Kochtableau.

Show it:

Fig. 1

FIG. 2 shows a schematic perspective illustration of a gas cooking appliance with gas radiation burners and an exhaust gas opening designed according to the invention,

Fig. 2

3 shows a detail from FIG. 2, on an enlarged scale, with a sectional view of the exhaust gas duct,

Fig. 3

1 and 2, but with atmospheric burners and a supply air opening designed according to the invention,

Fig. 4

a broken view of a section of the rear bent part of the cooking surface with a central recess in the bent area to form the supply or exhaust air opening,

Fig. 5

in a broken representation, a section of the part of the cooking surface which is bent backwards with circular recesses in the bent part which form the supply or exhaust air openings,

Fig. 5a

5, in which the glass ceramic cooktop is bent over two edges and the cutouts are formed in the horizontal, second bent area,

Fig. 6

2, but with an exhaust air opening at the rear,

Fig. 7

a glass ceramic plate in the middle of the cooking surface

Fig. 8

a partially ceramic glass plate on the back of the cooking surface,

Fig. 9

a glass ceramic plate curved downwards and off-center partially in a standing oven for atmospheric burners, forming a front opening for the supply air,

Fig. 10

a glass ceramic plate which is bent downwards in the center at the front to form a supply air opening at the front and which at the same time has an area which is partially bent at the rear to form an exhaust air opening, used in a standing range which can be equipped with both gas radiation burners and atmospheric burners,

Fig. 11

an installation recess with an electrical part and an adjacent, recessed gas part with atmospheric burners, in which the associated glass ceramic plates, spaced apart, have two right-angled bends to form a supply air opening for the gas part, and

Fig. 12

11 corresponding device combination, designed as a cooking panel.

1 shows a schematic perspective illustration Gas cooker 1 of the first version, built into a worktop 3. Das Gas cooker has a glass ceramic plate 2 as a cooking surface, which in one Hob frame 8 is attached, usually by gluing using a Silicone adhesive. In the exemplary embodiment according to FIG. 1, the gas cooking appliance has three cooking zones 4, which are arranged under the glass ceramic plate (not ) Radiant gas burners are heated. As if out of the DE 43 26 945 C2 cited at the beginning is below the Glass ceramic plate 2, an insulating part 9 is provided, which also partially from the Detail of FIG. 2 of the present application can be seen. This insulating part 9 has (not shown) recesses for the Gas radiation burner, but also exhaust gas channels 6 for removing the exhaust gases from the single gas radiant burner. The exhaust channels 6 merge below a zone 5 of the cooking surface and often used for cooking finally open into an exhaust gas opening 8a, designed according to the invention, a. To form the exhaust opening 8a, the cooking surface 2 is in the rear part folded upwards by a line 2a, so that the folded part 2b looms up like a desk.

The cooking surface 2 is glued to the cooking surface frame housing 8 in this way, that behind a slot-shaped, tack-free opening 8a, as an outlet for the hot exhaust gases 7 is formed.

According to the corresponding detail representation, the several hundred flow Degrees are called exhaust gases 7a into those formed from the insulation bodies 9 Exhaust gas channels 6 to the outlet opening 8a and are shortly before with cold Air 7b, which produces a blower, mixes that overall a clearly colder exhaust gas flow 7 leaves the gas cooking device.

A metal profile 8b can optionally be used to protect the bent cooking surface edge mechanically assembled. This profile does not have to be glued with silicone as it does not perform a sealing function in this case. Of the Overflow protection in this construction is due to the beveled upwards Part of the cooking surface 2b ensured.

The advantage of the construction of the exhaust opening 8a is that, on the one hand there are no adhesive connections in the hot exhaust gas flow and that through the Form of the cooktops automatically ensures overflow protection. In addition, there are no ventilation grilles in the metal frame, which on the one hand Adversely affect overall design and, on the other hand, cleaning complicate.

This type of construction according to the invention can also be used for gas cooking appliances the second version can be used with atmospheric burners. In this In this case, the opening 8a serves as a supply air opening for the primary air.

Fig. 3 shows schematically such a gas cooker 1 with a atmospheric burner 10, which in a conventional manner in the Glass ceramic plate 2 is embedded. As a rule, a hob has three to four such open burners 10.

The glass ceramic plate 2 is glued into the hob frame housing 8, the gas cooker itself is built into the worktop 3. Different to in Fig. 1, just to show the possible variations, is the Turning edge 2a with the bent area 2b on the (right) side of the Cooking surface 2. Here, as in Fig. 1, between the upper edge of the bent area 2b and the frame 8 a slot-shaped opening 8a trained, via which the supply or primary air 11 flows into the hob.

The bending edge 2a can of course, as in Fig. 1, on the rear side or also be arranged on the left side of the cooking surface. Which The alternative one chooses depends on the design and those in the neighborhood the gas cooker in the worktop 3 arranged devices.

4 shows a further embodiment of the invention with regard to the Formation of the opening for the supply or exhaust air, the case of the exhaust air is shown. Parts that match those of FIGS. 1-3 are with provided with the same reference numbers. In Fig. 4, the folded area 2b a partial recess 2c on the exhaust port 8a through which the cooled exhaust gases 7, forms. Otherwise, the upper edge of the bent area 2b embedded in the hob frame 8.

In the case of FIG. 4, the opening 8a is therefore not through a space (gap) to other device parts, as in Figs. 1-3, but through a recess formed in the bent area 2b itself. Another embodiment 5 shows this principle. The bent region 2b then points Recesses 2d arranged in rows, through which the exhaust or supply air flows. The circular recess is only an example. If it Design reasons may require other geometric configurations be used. The line-like arrangement is also only exemplary. The Recesses 2d can also be arranged offset, for example. The Recesses 2d must always be arranged so that they are at a sufficient distance to the cooktop level so that overflow protection is guaranteed. in the otherwise, the upper edge of the bent area 2b is completely in the Hob frame 8 embedded, giving a closed overall impression stressed.

Fig. 5a shows an arrangement similar to that of Fig. 5. Die Glass ceramic plate 2 of the cooking surface is over two bending edges 2a bent so that the area with the recesses 2d opposite the Cooking surface level is increased and arranged parallel to the plane. At this Embodiment, the exhaust gas flows vertically upwards, which is advantageous for the detection of the exhaust gases in the ones usually present in the kitchens Extractor hoods affects. So the exhaust gases can also advantageously not Soil the wall parts of the kitchen equipment gradually.

FIG. 6 shows an arrangement analogous to that of FIG. 2, however the outlet opening 8a not, as in the case of FIG. 2, between the through a Profile 8b protected upper edge of the bent area and one Increase the hob frame 8, but between this edge and one lowered edge of the frame 8 is formed so that the exhaust air 7 after flows away behind.

Fig. 7 shows a rear as a ventilation duct (supply or exhaust air) bent portion 2b, in contrast to the previous ones Embodiments with a bent area 2b, which is completely extends over one side of the hob. The sub-area 2b must also not, as in Fig. 7, to the center of the cooking surface side, it can also, as in Fig. 8 shown off-center, i.e. molded on one side, namely based on the cooking surface, either at the back or right or left.

The most varied options for training the bent area 2b also show FIGS. 9 and 10 using the example of a Cooker 12.

In the free-standing cooker 12 according to FIG. 9, which is a gas cooker with an open Gas burners 10 (as in FIG. 3) is formed with an integrated switch part 13, the glass ceramic plate 2 is bent down towards the front, in the area 2b the opening for the supply air 11 is formed.

10 can optionally be used as a gas cooker Gas radiation burners or with atmospheric burners can be designed. The glass ceramic plate is therefore under both at the front and at the back Formation of an area 2b, partially bent. The front area 2b forms the inlet opening for the primary supply air in the case of open burners, whereas the rear partial bend 2b is the opening for the outlet of the exhaust air 7 in the case of equipping the standing stove 12 with gas radiation burners.

In the previous embodiments, the opening for the Ab or Supply air between the top edge of the turn and a cooktop or Stove-appliance part formed. 11 and 12 are embodiments shown in which the opening to a part of a different type of cooker is trained.

Fig. 11 pulls out a built-in recess with glass ceramic cooktops an electrical part A and a gas part B. The glass ceramic plate 2 of the Electrical part A has cooking zones 14 and one bent downwards by 90 ° Area 2e on. The glass ceramic plate 2 of the gas part B, which compared to the Electrical part A is lowered, has open burner 10 and a right angle area 2b bent upwards, being between the bent Areas 2b and 2e left a certain distance, which as Entry opening for the supply air 11 to the gas burner part B acts.

Correspondingly, FIG. 12 shows a cooking tray formed from a Electrical part A with a glass ceramic plate 2, which is rectangular bent area 2e and cooking zones 14, and from a compared to the electrical part A lowered gas part B with a Glass ceramic plate 2, which is bent at right angles upwards Subarea 2b (partially covered by the fold 2e in the drawing) and atmospheric gas burners 11. Form as in the case of FIG. 11 here, too, the two bent regions 2e and 2b an opening with guidance of the supply air 11 to the gas part B.

Claims (12)

Gas cooker (1) with: at least one gas radiation or atmospheric burner (10), a glass or glass ceramic plate (2) as a cooking surface, which is fastened in a hob frame (8) and which is partially bent out of the cooking surface level, and With an opening (8 a, 2 c, 2 d) and an associated guide for the exhaust air (7) for gas radiant burners or for the supply air (11) for atmospheric burners, the ventilation area in the bent area (26) at a distance from the cooking surface level and at least as an exhaust opening without an adhesive connection between the glass or glass ceramic plate (2) and the hob frame (8). Gas cooker according to claim 1, characterized in that the glass or Glass ceramic plate (2) from the cooking surface level upwards is turned. Gas cooker according to claim 1, characterized in that the glass or Glass ceramic plate (2) from the cooktop level downwards is turned. Gas cooker according to one of claims 1 to 3, characterized characterized in that the turning edge (2a) extends over an entire side the cooking surface extends. Gas cooker according to one of claims 1 to 3, characterized characterized in that the bending edge (2a) of the bent area extends only over part of one side of the hob. Gas cooking appliance according to claim 5, characterized in that the Bending edge (2a) is formed in the center. Gas cooking appliance according to claim 5, characterized in that the Bending edge (2a) is formed off-center. Gas cooker according to one of claims 1 to 7, characterized characterized in that between the edge of the bent area (2b) and a device edge with an elongated opening (8a) Guide for the exhaust air outlet (7) or the inlet air inlet (11) is trained. Gas cooking appliance according to claims 2 and 4, characterized in that within the bent area (2b) at least one Recess (2c, 2d) as an outlet for the exhaust air (7) or as Inlet opening for the supply air (11) is formed and the Hob frame (8) with the edge of the bent area (2b) includes. Gas cooking appliance according to claim 9, characterized in that several circular recesses (2d) arranged in rows are. Gas cooking appliance according to claim 9, characterized in that a Central linear recess (2c) is provided, the depth of which is only extends over part of the depth of the bent region (2b). Gas cooking appliance according to claim 9 or 10, 11, characterized in that the glass or glass ceramic plate (2) over two bending edges (2a) is bent such that the second bent area is itself extends parallel to the cooking surface and the recess (2c, 2d) records.

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