Cooking oven with oven cavity and cooling channel

Abstract

The present invention relates to a cooking oven (10) with an oven cavity (12) and a cooling channel (14). The oven cavity (12) includes at least one cavity opening (16). The cooling channel (14) includes at least one guiding channel (18). The cavity opening (16) is connected to the guiding channel (18). The cavity opening (16) is surrounded by a first structure (22). The guiding channel (18) is surrounded by a second structure (24). The first structure (22) and the second structure (24) are formed complementary to each other.

Description

[0001] The present invention relates to a cooking oven with an oven cavity and a cooling channel.

[0002] In a cooking oven food is prepared within an oven cavity. The food is inserted into and removed from the oven cavity through a front opening. Said front opening is closable by an oven door. The oven door includes a glass window cooled down by a cooling system. Said cooling system sucks air from the interior of the oven door. The cooling system is formed by cooling ducts surrounding the oven cavity. A cooling fan on the top of the oven cavity circulates air within the cooling ducts.

[0003] During the cooking process steam and vapour in the interior of the oven cavity may condensate at the glass window of the oven door. In order to avoid the condensation of steam and vapour at the glass window of the oven door, a system for removing steam and vapour from the oven cavity is provided. The oven cavity has an aperture connected to the cooling system. Steam and vapour are sucked through said aperture by the cooling fan. The aperture is connected to the cooling system via a guiding channel. The guiding channel and the aperture form a passage for the steam and vapour sucked by the cooling fan. In order to avoid leakages, a sealing element is required between the guiding channel and the aperture.

[0004] Usually, the cooling channel is preassembled in a subsidiary station, while the oven cavity and the cooling channel are fixed to the housing in the main production line. This requires the sealing element at the correct position of the guiding channel and the aperture.

[0005] EP 2 687 787 A2 discloses an oven having a cooking chamber and a flow passage guide communicating between the cooking chamber and an inside of a cooling fan unit. The flow passage guide is connected with an opening of the cooking chamber by means of a first and a second structure formed complementary to each other. DE 199 49 724 A1 discloses an oven cavity with an exhaust air channel which are connected via a collar structure.

[0006] It is an object of the present invention to provide a cooking oven, which allows an improved sealing between the oven cavity and the cooling channel by low complexity.

[0007] The object is achieved by the cooking oven according to claim 1.

[0008] An alternative solution is provided in claim 2.

[0009] According to the present invention a cooking oven with an oven cavity and a cooling channel is provided, wherein: the oven cavity includes at least one cavity opening, the cooling channel includes a main cooling channel and at least one guiding channel, the cavity opening is connected to the guiding channel, the cavity opening is surrounded by a first structure, the guiding channel is surrounded by a second structure, and the first structure and the second structure are formed complementary to each other.

[0010] The complementary first structure and second structure provide a mechanical sealing between the cavity opening and the guiding channel. This mechanical sealing might be provided for example by fitting surfaces, a tongue and groove joint or another form fit of the first structure with the second structure. Any further sealing elements are not required for avoiding leakage.

[0011] Thus steam and vapours from a cooking process in the oven cavity may be guided through the cavity opening and the guiding channel to the cooling channel, in particular cooling main channel, and further to an outside of the cooking oven, in particular through an opening at the oven door for closing a front opening of the oven cavity or at the backside of the oven opposite to the oven door. In particular the cooling channel might be a preassembled cooling channel, which may further be provided with a cooling fan arranged above and in fluid connection with the cooling channel.

[0012] In an embodiment first and second structure enclose a second cavity, formed above the oven cavity, wherein the cavity opening connects the cavity with the second cavity and the at least one guiding channel connects the second cavity with the main cooling channel. A filtration element or catalyst element may be placed into the second cavity.

[0013] The cavity opening is preferably formed in the top wall of the oven cavity. There might be one or several cavity openings surrounded by the first structure. The first structure might be formed into the cavity wall as single piece. In an alternative embodiment the first structure might be provided as shaped part connected or connectable to the oven cavity.

[0014] Preferably, the cooling channel is arranged above the oven cavity. In particular the cooling channel is provided with walls, in particular with a bottom wall being separated from a top wall of the oven cavity. In the spacing in between a bottom wall of the cooling channel and the top wall the oven cavity a further part of a cooling system might be located for example a duct for sucking cold air from an outside to be inserted into the cooling channel.

[0015] The second structure might be provided as single piece with one of the cooling channel walls, in particular with a bottom wall of the cooling channel. In an alternative embodiment the second structure might be provided as shaped part connected or connectable to the cooling channel. There might be one or several guiding channels surrounded by the second structure.

[0016] Further, the oven cavity may be fixed at a housing of the cooking oven.

[0017] In a similar way, the cooling channel may be fixed at the housing of the cooking oven.

[0018] For example, the oven cavity is fixed at side walls of the cooking oven by screws.

[0019] Similarly, the cooling channel may be fixed at the side walls of the cooking oven by screws.

[0020] In particular, the first structure is formed rotation-symmetrically in view of the cavity opening. The cavity opening might be arranged in the centre of the first structure or off axis.

[0021] In a similar way, the second structure is formed rotation-symmetrically in view of the guiding channel. The guiding channel might be arranged in the centre of the first structure or off axis.

[0022] For example, the first structure is embossed around the cavity opening.

[0023] Similarly, the second structure may be embossed around the guiding channel.

[0024] Moreover, the oven cavity and the cooling channel are indirectly connected to each other.

[0025] Preferably, the oven cavity is made of carbon steel. Further, the oven cavity may be made of stainless steel.

[0026] Preferably, the cooling channel is made of carbon steel. Further, the cooling channel may be made of stainless steel.

[0027] Preferably, the oven is provided with a cooling fan. The cooling fan is located such that it enhances circulation through the cooling channel, in particular steam and vapour are sucked by the cooling fan from the oven cavity trough the cavity opening and the guiding channel. The cooling fan may be driven by a motor located above a top wall of the cooling channel, wherein the cooling fan blades may be arranged inside the cooling channel or in a chamber in fluid connection with the cooling channel. Furthermore, the cooling fan may suck cold air from an outside through a connected cooling system, in particular through the duct, to mix cold air with steam and vapour sucked from the oven cavity and promote exhaustion of the mixture to an outside. The cooling fan may be located in axis with the cavity opening and / or guiding channel and / or the first and second structure. In particular, an axis of the cooling fan might be in line with the cavity opening and the guiding channel and / or with the centers of the first and second structure. Alternatively, the cooling fan might be located in a distance D from a center of the second structure. In particular, the cooling fan might be located in a distance D from the second structure towards an opening of the cooling channel to an outside.

[0028] Novel and inventive features of the present invention are set forth in the appended claims.

[0029] The present invention will be described in further detail with reference to the drawings, in which FIG 1illustrates a schematic partial exploded sectional side view of a cooking oven according to an embodiment of the present invention, FIG 2illustrates a more detailed schematic partial exploded sectional side view of the cooking oven according to the embodiment of the present invention according to FIG 1, FIG 3a, billustrates a schematic perspective view of guiding channels in a bottom wall of a cooling channel for the cooking oven according to an embodiment of the present invention, FIG 4a,billustrates a schematic perspective view of cavity openings in a top wall of an oven cavity for the cooking oven according to an embodiment of the present invention, FIG 5a-cillustrates a schematic partial side view of the cooking oven according to embodiments of the present invention, FIG 6a-cillustrates a schematic partial side view of the cooking oven according to embodiments of the present invention, and FIG 7illustrates a schematic partial perspective view of the cooking oven according to an embodiment of the present invention.

[0030] FIG 1 illustrates a schematic partial exploded sectional side view of a cooking oven 10 according to an embodiment of the present invention.

[0031] The cooking oven 10 comprises an oven cavity 12 and a cooling channel 14. A front opening of the oven cavity 12 is closable by an oven door 11. The cooling channel 14 is arranged above the oven cavity 12. The cooling channel 14 comprises a main cooling channel 15 and a guiding channel 18. A cavity opening 16 is formed in a top wall of the oven cavity 12. The guiding channel 18 is formed in a bottom wall of the cooling channel 14. When the cooling channel 14 is put onto the oven cavity 12, then the cavity opening 16 and the guiding channel 18 are connected indirectly to each other.

[0032] A first structure 22 is formed around the cavity opening 16. A second structure 24 is formed around the guiding channel 18. The first structure 22 and the second structure 24 are formed complementary to each other. The first structure 22 and the second structure 24 provide a mechanical sealing between the cavity opening 16 and the guiding channel 18.

[0033] FIG 2 illustrates a more detailed schematic partial exploded sectional side view of the cooking oven 10 according to the embodiment of the present invention.

[0034] The guiding channel 18 of the cooling channel 14 is arranged above the cavity opening 16 of the oven cavity 12. The first structure 22 around the cavity opening 16 and the second structure 24 around the guiding channel 18 are formed complementary to each other. In the shown embodiment a protrusion 28 of the second structure 24 is inserted into a groove 26 of the first structure 22.

[0035] FIG 3a illustrates a schematic perspective view of the guiding channel 18 formed in the bottom wall 14a of the cooling channel 14 for the cooking oven 10 according to the embodiment of the present invention.

[0036] The second structure 24 is formed around the guiding channel 18. Said second structure 24 is formed complementary to the first structure 22 formed around the cavity opening 16. The second structure 24 is formed rotation-symmetrically in view of the guiding channel 18.

[0037] Preferably, the cooling channel 14 is made of carbon steel. Further, the cooling channel 14 may be made of stainless steel.

[0038] Fig. 3b shows an alternative embodiment. In this embodiment, there are two guiding channels 18. The guiding channels are arranged non-central to the second structure 24. In particular the two guiding channels 18 may be arranged on an inclined surface of the second structure 24 on the same side. Another number of guiding channels is possible.

[0039] FIG 4a illustrates a schematic perspective view of the cavity opening 16 in the top wall 12a of an oven cavity 12 for the cooking oven 10 according to the embodiment of the present invention.

[0040] The first structure 22 is formed around the cavity opening 16. Said first structure 22 is formed complementary to the second structure 24 formed around the guiding channel 18. The first structure 22 is formed rotation-symmetrically in view of the cavity opening 16.

[0041] Preferably, the oven cavity 12 is made of carbon steel. Further, the oven cavity 12 may be made of stainless steel.

[0042] FIG 4b shows an alternative embodiment. In this embodiment, there are two cavity openings 16. The cavity openings 16 are arranged non-central to the first structure 22. In particular the two cavity openings 16 may be arranged on an inclined surface of the first structure 22 on the same side. Another number of cavity openings is possible.

[0043] FIG 5a illustrates a schematic partial side view of the cooking oven 10 according to an embodiment of the present invention.

[0044] The cooking oven 10 comprises the oven cavity 12 and the cooling channel 14, wherein the cooling channel 14 is arranged above the oven cavity 12. The first structure 22 around the cavity opening 16 and the second structure 24 around the guiding channel 18 are engaged with each other. Thus a second cavity 25 is formed by the first structure 22 and the second structure 24. The engagement between the first structure 22 and the second structure 24 provide the mechanical sealing between the cavity opening 16 and the guiding channel 18. Any further sealing elements are not required. In the depicted embodiment the first structure 22 is formed by embossment into the cavity wall 12a and the second structure 24 is formed by embossment into a bottom wall 14a of the cooling channel 14.

[0045] FIG 5b illustrates a further embodiment. According to this embodiment the first structure 22 is a shape part 22a which is attached to the top wall 12a of the cavity 12 instead of the embossment into the top wall 12a as shown in FIG 5a.

[0046] FIG 5c illustrates an embodiment with a first structure 22 formed from a shape part 22a, and a second structure 24 formed from a shape part 24a and attached to the cooling channel 14 replacing the embossments into the top wall 12a and the bottom wall 14a shown in FIG 5a. In a further non depicted embodiment only the second structure may be formed from a shape part 24a.

[0047] The embodiments shown in FIG 5a-c may be combined with first structure 22 and cavity opening(s) 16 as depicted in FIG 4a,b and with the second structure 24 and guiding channel(s) 18 as depicted in FIG 3a,b.

[0048] FIG 6a illustrates an embodiment with a cooling fan 32 arranged with the cooling channel 14. The cooling fan 32 is driven by a motor located above a top wall 14b of the cooling channel 14, wherein the blades of the cooling fan 32 are depicted inside the cooling channel 14. Supporting structures of the cooling fan 32 and optional air guiding elements arranged at or around the blades of the cooling fan 32 are not shown.

[0049] FIG 6a depicts an on axis configuration of the cooling fan 32, wherein the axis of the cooling fan 32 is located in axis with a center of the first structure 22 and a center of the second structure 24. The cooling fan 32 sucks steam and vapour though the cavity opening 16, the second cavity 25, which may be provided with a filtration element, and the guiding channel 18 into a main channel of the cooling channel 14. The cooling fan 32 may optionally suck cold air from an outside though a duct 30 to be mixt with the steam and vapour inside the cooling channel 14 to be exhausted to an outside. Duct 30 may be located above the top wall 12a of the oven cavity 12 and below a bottom wall 14a of the cooling channel. According to the invention, the first structure or the second structure 22, 24 is formed either by embossment or by shaped parts 22a, 24a as shown in Fig. 5a-c.

[0050] FIG 6b illustrates an alternative arrangement of the cooling fan 32. First and second structure 22, 24 as well as the cavity opening 16 and the guiding channel 18 are arranged in line. The cooling fan 32 is placed at some distance D towards the back of the oven 10. Even though in the illustrated embodiment, the distance D is chosen such that the fan blades overlap the second structure partially but not the guiding channel, the distance D can be also chosen such that fan blades and the first and second structure do not overlap. The first structure and the second structure 22, 24 might be formed f.e. by embossment or by shaped parts 22a, 24a as shown in Fig. 5a-c.

[0051] FIG 6c shows an alternative embodiment to Fig. 6b wherein the cooling fan 32 is placed at some distance D towards the front of the oven 10. In this embodiment the opening of the cooling channel is placed above or in the oven door 11. Even though Fig 6c depicts an off-axis arrangement of the cooling fan 32, the fan could alternatively be placed on axis as shown in Fig. 6a with the cooling channel opening directed at the oven door 11.

[0052] The embodiments shown in FIG 6a-c may be combined with first structure 22 and cavity opening(s) 16 as depicted in FIG 4a,b and with the second structure 24 and guiding channel(s) 18 as depicted in FIG 3a,bas well.

[0053] FIG 7 illustrates a schematic partial perspective view of the cooking oven 10 according to an embodiment of the present invention.

[0054] The cooking oven 10 comprises two side walls 20. The oven cavity 12 having a front opening 13 is attached at said side walls 20 by screws. Moreover, the cooling channel 14 is attached at the side walls 20 by screws. The side walls 20 may be mounted on or supported by a supporting structure 21 arranged under the oven cavity 12.

[0055] At the assembling of the cooking oven 10, the oven cavity 12 is fixed to the housing of said cooking oven 10. Then, the cooling channel 14 is laid on the oven cavity 12, wherein the first structure 22 and the second structure 24 come into contact. The complementary surfaces of the first structure 22 and the second structure 24 align the correct position of the cooling channel 14 relative to the oven cavity 12. At last, the cooling channel 14 is fixed by screws to the housing of the cooking oven 10.

[0056] The cooling channel 14 and the oven cavity 12 are indirectly connected to each other.

[0057] Although an illustrative embodiment of the present invention has been described herein with reference to the accompanying drawings, it is to be understood that the present invention is not limited to that precise embodiment, and that various other changes and modifications may be affected therein by one skilled in the art. The scope of the invention is defined by the appended claims.List of reference numerals

[0058] 10cooking oven 11oven door 12oven cavity 12atop wall of oven cavity 13front opening 14cooling channel 14abottom wall of cooling channel 14btop wall of the cooling channel 15main cooling channel 16cavity opening 18guiding channel 20side wall 21bottom supporting structure 22first structure 22ashape part 24second structure 24ashape part 25second cavity 26groove 28protrusion 30duct 32fan

Claims

1. A cooking oven (10) with an oven cavity (12) and a cooling channel (14), wherein: - the oven cavity (12) includes at least one cavity opening (16), - the cooling channel (14) includes at least one guiding channel (18), - the cavity opening (16) is connected to the guiding channel (18), - the cavity opening (16) is surrounded by a first structure (22), - the guiding channel (18) is surrounded by a second structure (24), and - the first structure (22) and the second structure (24) are formed complementary to each other, wherein complementary first structure (22) and second structure provide (24) a mechanical sealing between the cavity opening (16) and the guiding channel (18), characterized in that the first structure (22) is embossed around the cavity opening (16) into the top wall (12a) of the cavity (12) or that the first structure (22) is formed as shape part (22a) attached to the top wall (12a) of the cavity (12).

2. A cooking oven (10) with an oven cavity (12) and a cooling channel (14), wherein: - the oven cavity (12) includes at least one cavity opening (16), - the cooling channel (14) includes at least one guiding channel (18), - the cavity opening (16) is connected to the guiding channel (18), - the cavity opening (16) is surrounded by a first structure (22), - the guiding channel (18) is surrounded by a second structure (24), and - the first structure (22) and the second structure (24) are formed complementary to each other, wherein complementary first structure (22) and second structure (24) provide a mechanical sealing between the cavity opening (16) and the guiding channel (18), characterized in that the second structure (24) is embossed around the guiding channel (18) into the bottom wall (14a) of the cooling channel (14) or that the second structure (24) is formed as shape part (24a) attached to the bottom wall (14a) of the cooling channel (14).

3. The cooking oven according to claim 1 or 2, characterised in that the cooling channel (14) is arranged above the oven cavity (12), wherein a bottom wall (14a) of the cooling channel (14) is arranged above a top wall (12a) of the oven cavity (12).

4. The cooking oven according to claim 1, 2 or 3, characterised in that the oven cavity (12) is fixed at a housing (20) of the cooking oven (10).

5. The cooking oven according to any one of the preceding claims, characterised in that the cooling channel (14) is fixed at the housing (20) of the cooking oven (10).

6. The cooking oven according to any one of the preceding claims, characterised in that the oven cavity (12) is fixed at side walls (20) of the cooking oven (10) by screws.

7. The cooking oven according to any one of the preceding claims, characterised in that the cooling channel (14) is fixed at the side walls (20) of the cooking oven (10) by screws.

8. The cooking oven according to any one of the preceding claims, characterised in that the first structure (22) is formed rotation-symmetrically in view of the cavity opening (16).

9. The cooking oven according to any one of the preceding claims, characterised in that the second structure (24) is formed rotation-symmetrically in view of the guiding channel (18).

10. The cooking oven according to any one of the claims 2 to 9, characterised in that the first structure (22) is embossed around the cavity opening (16) into the top wall (12a) of the cavity (12) or that the first structure (22) is formed as shape part (22a) attached to the top wall (12a) of the cavity (12).

11. The cooking oven according to any one of the claims 1 or 3 to 9, characterised in that the second structure (24) is embossed around the guiding channel (18) into the bottom wall (14a) of the cooling channel (14) or that the second structure (24) is formed as shape part (24a) attached to the bottom wall (14a) of the cooling channel (14).

12. The cooking oven according to any one of the preceding claims, characterised in that the oven cavity (12) and the cooling channel (14) are indirectly connected to each other in particular by a second cavity (25).

13. The cooking oven according to any one of the preceding claims, characterised in that the oven cavity (12) is made of carbon steel.

14. The cooking oven according to any one of the claims 1 to 12, characterised in that the oven cavity (12) is made of stainless steel.

15. The cooking oven according to any one of the preceding claims, characterised in that the cooling channel (14) is made of carbon steel.

16. The cooking oven according to any one of the claims 1 to 13, characterised in that the cooling channel (14) is made of stainless steel.

17. The cooking oven according to any one of the preceding claims, characterised in further comprising a fan (32), wherein a fan (32)is located in axis with the cavity opening (16) and / or guiding channel (18) and / or the first and second structure or wherein the fan (32) is located in a distance D from a center of the second structure (24).

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