EP2743589B1 - Cooking appliance with burner - Google Patents

Description

Technical field

The invention relates to a cooking appliance with a hob, which includes a top plate and a burner. The invention particularly relates to the attachment of the burner on the hob.

State of the art

The burners of a cooking appliance can be mounted on a hob, on which an opening is provided for each burner. One of the fastening methods is that the burner housing is generally fastened with screws to the lower plate (15) of the cooktop or to an external base ( 10 and 11 ). Thereafter, the lower plate or the lower support is attached to the side walls of the cooking appliance. In the first method, there is no connection between the burner and the top plate.

In another method, the burner housing is secured to the upper plate usually with screws passing through the burner housing or through the top plate ( FIGS. 12, 13 and 14 ).

In some embodiments, the gas distributor and the burner housing, which are located on the hob, are connected to each other with screws or similar elements.

As an example of such embodiments, the patent application with the publication number US6817355 to be named. According to this patent, the burner housing, which is located under the top plate of the hob, and the gas distributor, which is located on the top plate, connected to each other via openings with screws, thus producing a gas burner.

Accordingly, in the last two embodiments, the burner housing is supported by the top plate. In some embodiments, the burner housing is also supported by a bottom plate or bottom post.

US 4,572,154 A discloses a gas hob having a top plate with at least one opening, a burner, means for separately releasably holding the burners in the opening, which is the sole support for the burner, a burner box below the burner, the burner having an opening at the bottom to receive gas to be combusted to absorb gas and a gas port located in the burner box below the burner, located immediately below and spaced therefrom of the burner opening and therebetween and without air shut-off means therebetween.

The object of the invention is to ensure that the flame produced at the burner is at the same distance from the top plate of the hob.

The object of the invention is to gewanneisten that the flame produced at the burner in order to meet the stated object, the invention requires a cooking appliance with at least one hob, which has at least one opening on the top plate; with at least one burner housing, the neck portion protrudes from the opening and the remainder is disposed below the top plate; with a support wall on the burner housing, which is disposed below the top plate and oriented away from the top plate oriented. The cooking appliance also has a fastener with a support member which is in contact with the support wall, and a holder which extends from the support member via the Opening of the top plate extends to the surface of the top plate and carries over the support wall, the burner housing. Thus, the neck portion of the burner housing will reach a uniform height above the top plate at each point. As a result, the gas distributor, burner cap, and flame associated with the neck portion will be at a uniform distance from the top plate. A uniformly spaced flame optimizes carbon monoxide (CO) and avoids reducing combustion efficiency. In addition, the invention requires no screws for fastening, processing and time-consuming fasteners, whereby a quick and easy installation of the burner is guaranteed. By eliminating the screws, the invention also prevents possible cracks of the paint on the top plate, which can be caused by the screws or tapped holes. Because the neck does not touch the edge of the opening, there will be no cracks. In addition, no lower plate is required for the hob, because the burner is held by the holding member on the top plate. These benefits reduce scrapping, assembly and maintenance costs.

According to the burner housing contains a flange which forms a support wall with the lower side, the neck part partially encloses and remains under the top plate. Accordingly, the support member includes a Flanschaussparung in which at least a portion of the flange is located. Thus, it is ensured that even with burner housings, which are connected by a screw connection via the flange with the top plate, this invention can be used.

In a preferred embodiment of the invention, the bracket includes a clamp which, while mounting the burner housing with a fastener while allowing the upward movement of the top plate, but prevents the downward movement of the burner housing during operation. In a preferred embodiment of the invention, the clip includes a support surface which is parallel to the top plate of the hob. In another embodiment, the clip, when pushed up under the top plate, contacts the opening edge of the holder and causes the burner housing to be pushed toward the neck portion. As a result, a surface inclined upward from the support surface is obtained. Thus, the burner is hung on the top plate. Due to the design of the clamp, the entire edge of the opening is no longer hooked in to ensure equilibrium, but only the points necessary for this, resulting in a cost-effective installation of the burner.

In a preferred embodiment of the invention, the fastening element between the holder and the support member includes a flexible edge, whereby the holder can stretch in the direction of the neck portion of the burner housing. Thus, the bracket can be extended back and forth as if it were rotating about the axis of the flexible edge. In this way, the assembly and disassembly of the invention is facilitated and created a flexible application.

In a preferred embodiment of the invention, the support member looks like a clamp in C-shape with two free ends. Thus, a one-piece fastener is provided with multiple brackets. In this way, sufficient mounts can be used for a stable fixation in a single assembly step. As a result, production and processing costs are reduced.

In a preferred embodiment of the invention, the support member includes a flexible bridge member through which the free ends of the support member are pulled apart to the mounting position and then can return to the rest position. Thus, the installation of the C-shaped fastener is possible without much effort. It also ensures that the fastener preserves its mounting position.

In a preferred embodiment of the invention, the support element at both ends in each case a holding element to perform the force application, so that the two free Ends away from each other. This makes assembly and disassembly of the C-shaped fastener easier and saves time.

In a preferred embodiment of the invention, the fastener includes a spring steel. This ensures the required flexibility of the elements and at the same time achieves a high resistance in the fastening element.

In a preferred embodiment of the invention, the cooking device between the support member and the flange includes a sealing element. In this way, the penetration of liquids from the top plate of the hob is prevented down.

In a preferred embodiment of the invention, the top plate includes a recess at the opening edge directly opposite the holder. Thus, in the embodiments without recess, in which the holder can not be sufficiently expanded and the installation seems very tedious or impossible, a mounting allows.

In a preferred embodiment of the invention, an expansion distance between the holder and the neck portion of the burner housing is provided. Thus, a distance for the expansion and bending of the holder is obtained during assembly.

Explanation of the illustrations

• Fig. 1 shows a representative perspective view of the preferred first embodiment of the mounted on a burner housing fastener. The burner housing shown in the figure is fastened with screws to the top plate according to the current technology.
• Fig. 2 shows a perspective view of the in Fig. 1 illustrated fastener from above.
• Fig. 3 shows an AA cut Fig. 2 ,
• Fig. 4 shows a BB cut Fig. 2 ,
• Fig. 5 shows the cross section of the bracket and the C details Fig. 4 ,
• Fig. 6 shows a representative perspective view of the in Fig. 1 shown burner housing with a fastening element, wherein the burner housing is mounted on the top plate of the hob.
• Fig. 7 shows a representative perspective view of the preferred first embodiment of the fastener.
• Fig. 8 shows a representative perspective view of the preferred second embodiment of the fastener.
• Fig. 9 shows a representative perspective view of the preferred third embodiment of the fastener.
• Fig. 10 shows a view of the hob from above, with a held today by the art through the lower plate burner housing.
• Fig. 11 shows a DD cut Fig. 10 ,
• Fig. 12 shows a view of the hob with a mounted today's technology to the top plate burner housing from above.
• Fig. 13 shows an EE cut Fig. 12 ,
• Fig. 14 shows F-details of screw holes coming out of the Fig. 13 arise and are located on the top plate.

Detailed explanation of the invention

In this detailed explanation, the preferred embodiments of the cooking appliance (1) according to the invention are explained only for better understanding and without any limiting effect.

The invention relates to a cooking appliance (1) having at least one hob (10), which has at least one opening (13) on the top plate (11); with at least one burner housing (20), the neck portion (21) protruding from the opening (13) and the remainder remaining under the top plate (11) in the opening (13); with a support wall (24) on the burner housing (20), which is designed under the top plate (11) and in the opposite direction of the top plate (11). The peculiarity of the invention is that it additionally has a fastening element (40) with a support element (50) which is in contact with the support wall (24) and a support (60) which extends from the support element (50) via the opening (50). 13) of the top plate (11) to the surface (12) of the top plate (11) and extends over the support wall (24) of the burner housing (20).

When in Fig. 1 shown burner housing (20), the preferred first embodiment of the fastener (40) is mounted. According to this preferred embodiment of the burner housing (20), the burner housing (20) according to the current state of the art ( Fig. 14 ) fastened with screws or similar elements to the top plate (11). However, the fastening element (40) according to the invention can be fastened to the top plate (11) without the use of screws.

The support element (50) of the fastening element (40) can be in contact with a support wall (24) provided on the burner housing (20). In the preferred embodiment, an integrated flange (23) is located on the burner housing (20). The flange (23) is parallel to the top plate (11). The underside of the flange (23) is used as a support wall (24). The flange (23) is preferably provided immediately below the top plate (11). The fact that the flange (23) or the support wall (24) is close to the top plate (11) leads to a saving of material in the production of the fastener (40) and has a positive effect on the production costs.

This in Fig. 1 to 7 shown fastener (40) is seen from above as a C-shaped bracket, the two ends (56) are exposed. The said shape would basically only have to be compatible with the burner housing (20), ie it may also be round, angular or in another form enclosing the burner housing (20). The neck portion (21) of the burner housing (20) is inserted into the inner space (42), in the middle of the fastener (40). The essential ingredient that forms the C-shape is the support member (50). On the support element (50) has a holder (60) is provided. For a stable mounting it is sufficient that the holder (60) rests on three points on the top plate (11). For this reason, in the preferred embodiment, on the C-shaped support member (50) instead of a C-shaped bracket (60), one, in three - preferably four - spaced-fitting brackets (60) are provided.

The support element (50) contains a flange recess (51) for the embodiments with flanges (23). The flange recess (23) is achieved by bending the metal plate in a U-shape and includes the upper, side and bottom surfaces of the flange (23). In the preferred embodiment, the bottom wall (52) of the flange recess (51) is kept shorter compared to the top wall (53). In this way, the mounting of the fastener (40) on the flange (23) is facilitated. For the installation of the flange (23) in the flange recess (51), in short for the mounting of the fastener (40), the free ends (56) of the C-shape must be pulled apart. Therefore, the fastener (40) must be flexible. The fastening element (40) is preferably made of metal plates (sheet metal). The preferred material is spring steel. Thus, the fastener (40) gets a flexible and robust structure. But also other flexible materials that are suitable for use in a cooking appliance (1) can also be used for the production of the fastener (40). Both Embodiments in which the holder (60) does not stretch sufficiently, a recess (14) is provided directly opposite the holder (60) at the edge of the opening (13). The recess (14) is in Fig. 6 shown only for a holder (60). If necessary, a recess (14) can be provided for each holder (60).

In order to support the flexibility and reduce the amount of material, the fastening element (40) an additional, flexible bridge element (55) is used ( Fig. 7 ). The bridge element (55) is provided at a certain point on the support element (50), which is preferably equidistant from both free ends (56). For this purpose, the bottom wall (52) and the top wall (53) of the flange recess (51) are excluded so that only the side wall (54) remains. At the end, only the plate-shaped bridge element (55) remains, which brings together the flange recesses (51) at both ends.

For a burner housing (20) on which a flange (23) with a screw channel (26) is present, at the locations opposite the screw channel (26) of the support element (50), the lower wall (52) and the side wall (54) the flange recess (51) omitted and only the upper wall (53) are provided ( Fig. 7 ).

As a result, formed on the preferred first fastener (40) 4 Flanschaussparungen (51), each with 90 ° spacing. Between the Flanschaussparungen (51) remain two spaces for the screw channel (26), a gap for the bridge element (55) and a space for the free ends (56).

At both free ends (56) in each case a holding element (57) is present. The holding element (57) is preferably a plate which comes out of the side wall (54) of the Flanschaussparung (51). It can be integrated on the support element (50) or also be welded afterwards. Preferably, it is produced by the bending of the metal plate in the opposite direction of the flange (23). The holding element (57) is bent and mounted by a tool or by hand.

In the first embodiment, a holder (60) is provided on the support member (50) for each flange recess (51). The bracket (60) is made by bending the metal plate in various directions and angles that forms the fastener (40). Thus arises at the turn of the connection point of the holder (60) and the Support member (50) has a flexible edge (41), by which it is ensured that the holder (60) can approach and remove the neck part (21).

The holder (60) is plate-shaped and preferably extends from the flexible edge (41) to the opening (13). In order for the holder (60) to be able to support the burner housing (20) on the top plate (11), a clamp (65) is provided in the holder (60).

The clip (65) is preferably made by bending the support plate (60). The plate is first bent in the height of the top plate (11) of the hob (10) at an angle of 90 ° in the opposite direction to the neck part (21). Thus, a support surface (66) is achieved parallel to the top plate (11). Thereafter, the region of the bearing surface (66) lying near the free end (61) is bent upward in the direction of the interior (42). The bending operation is repeated until the free end (61) of the holder (60) lies in the same imaginary plane with the first bending line. Thus, an inclined surface (67) extending from the second bending line to the neck portion (21) is obtained. By this inclined surface (67) during assembly, the holder (60) from the edge of the opening (13) to the neck portion (21) of the holder (60) are pushed, whereby the holder is passed through the opening (13) upwards , To carry out the pushing movement, a stretching distance (22) is provided between the holder (60) and the neck part (21). For this purpose, the flexible edge (41) seen from the edge, which defines the interior (42) of the support element (50), a little further than the interior (42) provided ( Fig. 7 ).

In a preferred second embodiment of the fastener (40), the fastener (40) is as shown in FIG Fig. 8 shown, not C-shaped. In this embodiment, it is assumed that the burner housing (20) does not have to be completely enclosed. For this purpose, a support element (50), which encloses only a certain area of the flange (23), and preferably also a holder (60) is used. In the second embodiment, actually, a plurality of parts which are held together in the first embodiment by the bridge member (55) and the upper wall (53) of the flange recess (51) are separated. When the preferred annular burner housing (20) is considered, the second embodiment includes a support member (50) in a spring shape of about 45 degrees. It also contains a holder (60). Since a three-point support is required for a balanced fixation, in the second embodiment, three fastening elements (40) are preferably at equal intervals on the Flange (23) set. In order for the support member (50) to firmly grip the flange (23), the lower (52) and upper walls (53) of the support member (50) are convergent with each other from the side wall (54). Thus, the flange (23) is clamped between the upper and lower walls (52, 53) and the position of the fastener (40) is maintained. One of the main advantages of the second embodiment is that it is easier to build compared to the first embodiment. In addition, it also offers flexibility for the manufacturers in terms of the number to be used. All of the features mentioned above in the first embodiment and in the second embodiment by a person skilled in the art can also be applied in the second embodiment.

In the in Fig. 9 illustrated embodiment of the fastener (40), the width of the support member (50) relative to the second embodiment is reduced and adapted to the same width of the holder (60). All the features mentioned above in the first two embodiments and which can be carried out by a person skilled in the art in the third embodiment can also be used in the third embodiment.

Preferably, in all embodiments of the invention, a sealing element (25) is present between the support wall (24) and the support element (50). Thus, it is partially or completely prevented that spilled liquids on the hob (10) get under the top plate (11).

The thickness of the steel used in the invention is preferably at least 0.1 mm. The expansion distance (22) is preferably set to max. 3 mm. <B> Reference numbers </ b> 1. cooker 40th fastener 41st Flexible edge 10th hob 42nd inner space 11th top plate 12th top 50th support element 13th opening 51st flange recess 14th recess 52nd Lower wall 15th lower plate 53rd Upper wall 54th Side wall 20th burner housing 55th bridge element 21st neck 56th Free end 22nd expansion gap 57th retaining element 23rd flange 24th retaining wall 60th bracket 25th sealing element 61st Free end 26th screw channel 65th clip 66th bearing surface 67th Inclined area

Claims (13)

1. Cooking appliance (1) with at least one hob (10) which has at least one opening (13) on the top plate (11); with at least one burner housing (20), the neck piece (21) of which protrudes from the opening (13) and the remainder of which is arranged below the top plate (11); with a supporting wall (24) on the burner housing (20), which is arranged below the top plate (11) and is oriented pointing away from the top plate (11), wherein the cooking appliance (1) also has a fastening element (40) with a supporting element (50) and a holder (60), wherein the fastening element represents a flexible and robust structure, wherein the supporting element (50) is in contact with the supporting wall (24), wherein the holder (60) extends from the supporting element (50) via the opening (13) of the top plate (11) to the surface (12) of the top plate (11) and by way of the supporting wall (24) supports the burner housing (20) and wherein the burner housing (20) contains a flange (23), which forms the supporting wall (24) with the lower side, partially encloses the neck piece (21) and remains below the top plate (11), characterised in that the supporting element (50) of the fastening element (40) contains a flange recess (51), which comprises an upper, lateral and lower surface of the flange (23).
2. Cooking appliance (1) according to claim 1, characterised in that a lower wall (53) of the flange recess (51) is kept shorter than an upper wall (53) of the flange recess (51).
3. Cooking appliance (1) according to one of the preceding claims, characterised in that the holder (60) contains a retaining clip (65), which, during assembly of the burner housing (20) with a fastening element (40), allows for the upward movement of the top plate (11), but prevents the downward movement of the burner housing (20) disposed in the operating position.
4. Cooking appliance (1) according to claim 3, characterised in that the retaining clip (65) contains a support surface (66), which runs in parallel to the top plate (11) of the hob (10).
5. Cooking appliance (1) according to claim 4, characterised in that the retaining clip (65) contains an inclined surface (67), which, if it is moved upwards below the top plate (11), touches the edge of the opening (13) and can be slid from the edge of the opening (13) to the neck piece (21).
6. Cooking appliance (1) according to one of the preceding claims, characterised in that the fastening element (40) between the holder (60) and the supporting element (50) contains a flexible rim (41), as a result of which the holder (60) can lengthen in the direction of the neck piece (21) of the burner housing (20).
7. Cooking appliance (1) according to one of the preceding claims, characterised in that the supporting element (50) is embodied as a C-shaped retaining clip with two free ends (56).
8. Cooking appliance (1) according to claim 7, characterised in that the supporting element (50) contains a flexible bridge element (55), by means of which the free ends (56) of the supporting element are pulled apart until reaching the assembly position in order then to be able to revert back to the position of rest.
9. Cooking appliance (1) according to claim 7 or 8, characterised in that the supporting element (50) contains a holding element (57) at both ends (56), in order to separate the free ends (56) from one another.
10. Cooking appliance (1) according to one of the preceding claims, characterised in that the fastening element (40) contains spring steel.
11. Cooking appliance (1) according to one of the preceding claims, characterised in that it contains a sealing element (25) between the supporting element (50) and the flange (23).
12. Cooking appliance (1) according to one of the preceding claims, characterised in that the top plate (11) contains a recess (14) at the opening edge (13) directly opposite to the holder (60).
13. Cooking appliance (1) according to one of the preceding claims, characterised in that an expansion gap (22) is provided between the holder (60) and the neck piece (21) of the burner housing (20).

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