Cooking appliance skimmer for a cooking appliance and cooking appliance with a cooking appliance skimmer

Abstract

Cooking appliance muffle (4) for a cooking appliance (2), comprising a cooking chamber (6) with a cooking chamber opening (8) that can be tightly closed by means of a door of the cooking appliance (2) and at least one cooking chamber wall (10) to delimit the cooking chamber (6), wherein the cooking appliance muffle (4) is designed to be suitable for explosion tests, where in one of the at least one oven chamber wall (10) a pressure equalization opening (12) is arranged for the discharge of an explosion pressure generated during an explosion test, wherein the pressure equalization opening (12) is tightly closed in a normal state of the cooking appliance muffle (4), in which the cooking chamber pressure in the cooking appliance muffle (4) is less than the explosion pressure, by means of a purely mechanical closing device (14) of the cooking appliance muffle (4), and wherein the closing device (14) is designed and arranged such that the closing device (14) automatically opens the pressure equalization opening (12) when the cooking chamber pressure is greater than or equal to the explosion pressure and automatically closes the pressure equalization opening (12) again after the cooking chamber pressure drops to a value below the explosion pressure, wherein the closing device (14) has a closing lid (16) attached to a remainder of the cooking appliance muffle (4) for closing the pressure equalization opening (12) in the normal state of the cooking appliance muffle (4), characterized by the fact that the locking device (14) has a stop (18) attached to the rest of the cooking appliance muffle (4), wherein the sealing lid (16) and the stop (18) are designed and arranged in such a way that the sealing lid (16) automatically closes the pressure equalization opening (12) again after the cooking chamber pressure has dropped to a value below the explosion pressure by means of a spring return force of the sealing lid (16), wherein the stop (18) is designed as an angle spanning the pressure equalization opening (12) and the closure cover (16) and clamped on both sides.

Description

[0001] The invention relates to a cooking appliance muffle for a cooking appliance of the type mentioned in the preamble of claim 1 and a cooking appliance with a cooking appliance muffle.

[0002] Such cooking appliance muffles for cooking appliances and cooking appliances with cooking appliance muffles are known from the prior art in a multitude of embodiments, for example from the publications EP 2 994 697 B1 and DE 77 32 919 U1.

[0003] The known cooking appliance muffles include, for example, a cooking chamber with a cooking chamber opening that can be tightly closed by means of a door of the cooking appliance and at least one cooking chamber wall to delimit the cooking chamber, wherein the cooking appliance muffle is designed to be suitable for explosion testing.

[0004] For example, explosion test suitability of cooking appliances and cooking appliances equipped with them is mandatory for products for the North American market, as these products are subjected to an explosion test for approval.

[0005] A cooking appliance of this type is shown in the publication EP 0 624 759 A1.

[0006] The invention thus faces the problem of improving a cooking appliance muffle for a cooking appliance and a cooking appliance with a cooking appliance muffle.

[0007] According to the invention, this problem is solved by a cooking appliance muffle for a cooking appliance having the features of claim 1. Furthermore, this problem is solved by a cooking appliance with a cooking appliance muffle having the features of claim 8. Advantageous embodiments and further developments of the invention are described in the following dependent claims.

[0008] The advantages achievable with the invention lie particularly in the fact that a cooking appliance muffle for a cooking appliance and a cooking appliance with a cooking appliance muffle are improved. Due to the inventive design of the cooking appliance muffle for a cooking appliance and the cooking appliance with a cooking appliance muffle, the suitability for explosion testing of the cooking appliance muffle and the cooking appliance equipped with it can be realized in a particularly simple and robust manner from a design and manufacturing perspective. Accordingly, the cooking appliance muffle and the cooking appliance equipped with it can be manufactured much more cost-effectively. The invention reliably ensures suitability for explosion testing, thus effectively preventing damage or pre-damage to the cooking appliance muffle and / or any part of the cooking appliance. For example, the explosion pressure associated with the explosion test can be kept away from the door of the cooking appliance, by means of which the cooking chamber opening can be closed.

[0009] In principle, the cooking appliance muffles according to the invention, and the cooking appliance itself equipped with them, can be freely selected within wide suitable limits in terms of type, function, material, and dimensions. For example, the cooking appliance according to the invention can be designed as an oven, a steam cooker, a microwave oven, or a combination appliance with a plurality of different heating methods. Furthermore, the cooking appliance according to the invention can be designed as a household cooking appliance or as a commercial cooking appliance, i.e., a cooking appliance for professional use. In addition, the cooking appliance according to the invention can be designed as a so-called pyrolytic appliance, i.e., an appliance with a self-cleaning function. The design of the cooking appliance muffles according to the invention is correspondingly diverse.For example, the arrangement, shape, and dimensions of the pressure equalization opening can be freely selected within wide, suitable limits. Advantageously, the pressure equalization opening is located above the cooking chamber, preferably centrally above it. It is also beneficial for the pressure equalization opening to be positioned higher on the cooking chamber relative to the surrounding portion of the chamber. This ensures a good, and therefore tight, seal between the sealing device and the pressure equalization opening.

[0010] A cooking appliance muffle according to the invention provides that the closing device has a closing lid attached to a portion of the cooking appliance muffle for closing the pressure equalization opening in the normal state of the cooking appliance muffle, and a stop attached to the portion of the cooking appliance muffle. The closing lid and the stop are designed and arranged in such a way that the closing lid automatically reseals the pressure equalization opening after the cooking chamber pressure drops to a value below the explosion pressure by means of a spring return force of the closing lid. This allows the purely mechanical closing device to be implemented in a very simple and robust manner.

[0011] An advantageous further development of the aforementioned embodiment of the cooking appliance muffle according to the invention provides that the closing lid is designed as a spring tongue clamped on one side, with a clamping end and a free end. In this way, the closing lid is particularly easy to implement in terms of design and manufacturing.

[0012] A cooking appliance muffle according to the invention for a cooking appliance provides that the stop is designed as an angle spanning the pressure equalization opening and the sealing lid and clamped on both sides.

[0013] Preferably, the angle from a first clamping end of the angle to a second clamping end of the angle opposite this first clamping end increases continuously by a predetermined angular value, wherein the first clamping end of the angle is located on the same side of the pressure equalization opening as the clamping end of the spring tongue clamped on one side. This also allows the stop to be implemented in a particularly simple manner from a design and manufacturing perspective.

[0014] A particularly advantageous embodiment of the cooking appliance muffle according to the invention provides that the stop has a plurality of through-openings on one side of the stop opposite the pressure equalization opening, preferably that the plurality of through-openings are arranged evenly distributed over the entire aforementioned side of the stop, and particularly preferably that the total area of ​​the through-openings corresponds to at least 10% of the total area of ​​the aforementioned side of the stop. In this way, firstly, the flow of the explosive gases escaping from the cooking chamber via the pressure equalization opening through the stop is obstructed as little as possible, according to the aforementioned embodiment of the cooking appliance muffle according to the invention. Secondly, this enables material and weight savings, as well as an associated additional cost saving.The aforementioned advantages apply particularly to the preferred and especially to the particularly preferred embodiment of this further development.

[0015] Another advantageous embodiment of the cooking appliance muffle according to the invention provides that the explosion pressure for which the sealing device is designed is greater than or equal to 10 mbar. This establishes an explosion pressure that is particularly suitable for the design of the sealing device.

[0016] Two embodiments of the invention are shown schematically in the drawings and are described in more detail below. It shows Fig. 1a A first embodiment of the cooking device according to the invention with the cooking device muffle according to the invention in a partial, perspective view, without the stop, Fig. 1b the first embodiment according to the Fig. 1a in an enlarged detail view in the area of ​​the pressure equalization opening, in perspective view, without the stop, Fig. 2a the first embodiment in analogous representation to Fig. 1a, with the attack, Fig. 2b the first embodiment in analogous representation to Fig. 1b, with the stop, Fig. 3a a second embodiment of the cooking device according to the invention with the cooking device muffle according to the invention in a partial, perspective view, with the stop and Fig. 3b the second embodiment according to the Fig. 3a in an enlarged detail view in the area of ​​the pressure equalization opening, in perspective view, with the stop.

[0017] In the Fig. Figures 1a to 2b show a first embodiment of the cooking device according to the invention with the cooking device muffle according to the invention purely by way of example.

[0018] The cooking appliance 2, designed as a household oven, includes, among other things, a cooking appliance cavity 4. The cooking appliance cavity 4 comprises a cooking chamber 6 with a cooking chamber opening 8 that can be tightly closed by means of a door of the cooking appliance 2 (not shown) and at least one cooking chamber wall 10 to delimit the cooking chamber 6, wherein the cooking appliance cavity 4 is designed to withstand explosion tests.

[0019] According to the invention, a pressure equalization opening 12 for dissipating an explosion pressure generated during an explosion test is arranged in one of the at least one cooking chamber wall 10, namely above the cooking chamber 6, wherein the pressure equalization opening 12 is located in a Fig. Figures 1a to 2b show the normal state of the cooking appliance muffle 4, in which the cooking chamber pressure in the cooking appliance muffle 4 is lower than the explosion pressure. The cooking appliance muffle 4 is tightly closed by means of a purely mechanical closing device 14. The closing device 14 is designed and arranged such that it automatically opens the pressure equalization opening 12 when the cooking chamber pressure is greater than or equal to the explosion pressure, and automatically closes the pressure equalization opening 12 again once the cooking chamber pressure drops below the explosion pressure. The explosion pressure for which the closing device 14 is designed in this embodiment is defined here as a pressure value of 10 mbar.

[0020] The closing device 14 has a closing cover 16 attached to a remainder of the cooking appliance muffle 4 for closing the pressure equalization opening 12 in the normal state of the cooking appliance muffle 4 and a stop 18 attached to the remainder of the cooking appliance muffle 4, wherein the closing cover 16 and the stop 18 are designed and arranged in such a way that the closing cover 16 automatically closes the pressure equalization opening 12 again after the cooking chamber pressure has dropped to a value below the explosion pressure by means of a spring return force of the closing cover 16.

[0021] In the present embodiment, the closure cover 16 is designed as a spring tongue clamped at one end, with a clamping end and a free end, wherein the closure cover 16 is attached to the rest of the cooking appliance muffle 4 at its clamping end by means of two screws 20. However, any other suitable and appropriate connection technique for realizing the aforementioned clamping end is also conceivable.

[0022] The stop 18 is designed here as an angle bracket spanning the pressure equalization opening 12 and the closure cover 16, clamped at both ends. The angle 18 increases continuously by a predetermined angular value from a first clamping end of the angle 18 to a second clamping end of the angle 18 opposite this first clamping end. The first clamping end of the angle 18 is located on the same side of the pressure equalization opening 12 as the clamping end of the spring tongue 16, which is clamped at one end. Analogous to the closure cover 16, which is designed as a spring tongue, the angle bracket 18 is fastened to the rest of the cooking appliance muffle 4 by means of four screws 22. Of course, any other sensible and suitable connection technique for realizing the aforementioned clamping ends is also conceivable.

[0023] In the Fig. 3a and Fig. Figure 3b shows a second embodiment of the cooking device according to the invention, including the cooking device muffle according to the invention. Identical or equivalent components are designated with the same reference numerals.

[0024] In contrast to the first embodiment according to the Fig. In the second embodiment, as described in sections 1a to 2b, the stop 18 has a plurality of through-openings 26 on one side of the stop 18 opposite the pressure equalization opening 12. These multiple through-openings 26 are evenly distributed over the entire aforementioned side of the stop 18 such that the total area of ​​the through-openings 26 corresponds to at least 10% of the total area of ​​the aforementioned side of the stop 18. Otherwise, the second embodiment corresponds to the first embodiment, and reference is made to the aforementioned descriptions of the first embodiment.

[0025] The following describes the operating principles of the cooking appliance muffles and the cooking appliance according to the present exemplary embodiments, based on the Fig. 1a to 3b are explained in more detail.

[0026] Initially, the cooking appliance 2 with the cooking appliance muffle 4 is located in the Fig. Figures 1a to 3b show the normal state in which the cooking chamber pressure in the cooking appliance muffle 4 is lower than the explosion pressure, namely 10 mbar. The pressure equalization opening 12 is tightly closed by means of the purely mechanical closing device 14.

[0027] For the purpose of the explosion test, the cooking appliance is now sealed tightly as usual, namely by means of the door not shown, and the cooking chamber pressure in cooking chamber 6 is slowly increased from ambient pressure to the explosion pressure, namely 10 mbar.

[0028] As soon as a pressure of 10 mbar is reached in the cooking chamber, the pressure equalization opening 12 is automatically opened by means of the closing device 14. Due to the explosion pressure prevailing in the cooking chamber 6, the closing cover 16 is lifted away from the pressure equalization opening 12 against its spring force, so that the explosion pressure can be specifically discharged from the cooking chamber 6 via the pressure equalization opening 12. The closing cover 16 rests against the stop 18, ensuring that the closing cover 16 can automatically close the pressure equalization opening 12 again by means of its spring force after a corresponding pressure drop in the cooking chamber 6.

[0029] After the cooking chamber pressure has been reduced from the explosion pressure to a pressure value below the explosion pressure, i.e., below 10 mbar, in the aforementioned manner, the pressure equalization opening 12 is automatically closed again by means of the closing device 14 in the aforementioned manner. The cooking appliance muffle 4 is then back in its normal state.

[0030] The aforementioned functionality is identical in both embodiments. However, the second embodiment has, for example, the additional advantage that the pressure reduction in the cooking chamber 6 can occur even faster via the pressure equalization opening 12 due to the stop 18 provided with the through-openings 26.

[0031] Due to the inventive design of the cooking appliance muffle 4 and the cooking appliance 2, explosion test suitability can be achieved in a particularly simple and robust manner from a design and manufacturing perspective. Accordingly, the cooking appliance muffle 4 and the cooking appliance 2 equipped with it can be manufactured much more cost-effectively. The suitability for explosion tests is reliably ensured by both embodiments, thus effectively preventing damage or pre-damage to the cooking appliance muffle 4 and / or any part of the cooking appliance 2. For example, the explosion pressure associated with the explosion test can be kept away from the door of the cooking appliance 2 (not shown), by means of which the cooking chamber opening 8 can be closed.

[0032] The invention is not limited to the present embodiments. See, for example, the relevant explanations in the introductory section.

Claims

[1] Cooking appliance muffle (4) for a cooking appliance (2), comprising a cooking chamber (6) with a cooking chamber opening (8) that can be tightly closed by means of a door of the cooking appliance (2) and at least one cooking chamber wall (10) to delimit the cooking chamber (6), wherein the cooking appliance muffle (4) is designed to be suitable for explosion tests, where in one of the at least one oven chamber wall (10) a pressure equalization opening (12) is arranged for the discharge of an explosion pressure generated during an explosion test, wherein the pressure equalization opening (12) is tightly closed in a normal state of the cooking appliance muffle (4), in which the cooking chamber pressure in the cooking appliance muffle (4) is less than the explosion pressure, by means of a purely mechanical closing device (14) of the cooking appliance muffle (4), and wherein the closing device (14) is designed and arranged such that the closing device (14) automatically opens the pressure equalization opening (12) when the cooking chamber pressure is greater than or equal to the explosion pressure and automatically closes the pressure equalization opening (12) again after the cooking chamber pressure drops to a value below the explosion pressure, wherein the closing device (14) has a closing lid (16) attached to a remainder of the cooking appliance muffle (4) for closing the pressure equalization opening (12) in the normal state of the cooking appliance muffle (4), characterized by , that the locking device (14) has a stop (18) attached to the rest of the cooking appliance muffle (4), wherein the sealing lid (16) and the stop (18) are designed and arranged in such a way that the sealing lid (16) automatically closes the pressure equalization opening (12) again after the cooking chamber pressure has dropped to a value below the explosion pressure by means of a spring return force of the sealing lid (16), wherein the stop (18) is designed as an angle spanning the pressure equalization opening (12) and the closure cover (16) and clamped on both sides. [2] Cooking appliance muffle (4) according to the preceding claim, characterized by , that the closure cover (16) is designed as a spring tongue clamped on one side with a clamping end and a free end. [3] Cooking appliance muffle (4) according to one of the preceding claims, characterized by, that the angle (18) from a first clamping end of the angle (18) to a second clamping end of the angle (18) opposite this first clamping end increases continuously by a predetermined angle value, wherein the first clamping end of the angle (18) is on the same side of the pressure equalization opening (12) as the clamping end of the spring tongue (16) clamped on one side. [4] Cooking appliance muffle (4) according to the preceding claim, characterized by , that the stop (18) has a plurality of through-openings (26) on one side of the stop (18) opposite the pressure equalization opening (12). [5] Cooking appliance muffle (4) according to the preceding claim, characterized by , that the majority of through-openings (26) are arranged evenly distributed over the entire aforementioned side of the stop (18). [6] Cooking appliance muffle (4) according to one of the two preceding claims, characterized by, that a total area of ​​the passage openings (26) corresponds to at least 10% of a total area of ​​the aforementioned side of the stop (18). [7] Cooking appliance muffle (4) according to one of the preceding claims, characterized by , that the explosion pressure to which the closure device (14) is designed is greater than or equal to 10 mbar. [8] Cooking appliance (2), comprising a cooking appliance muff (4), characterized by , that the cooking appliance muffle (4) is designed according to one of the preceding claims. [9] Cooking appliance (2) according to the preceding claim, characterized by , that the cooking appliance (2) is designed as an oven, a steam cooking appliance, a microwave oven or as a combination appliance with a plurality of different heating methods. [10] Cooking appliance (2) according to the preceding claim, characterized by , that the cooking appliance (2) is designed as a so-called pyrolytic appliance.

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