DE102017220887A1 - Oven with sensor device - Google Patents

Abstract

A baking oven (1) has an oven (3) provided on the outside with a heat-insulating insulation (5), an opening (6) leading through the oven (3) and the insulation (5), and a sensor device (2) with at least one sensor element (FIG. 7) which is arranged outside the baking tube (3) and the insulation (5) and is directed through the opening (6) into the baking tube (3), wherein the sensor device (2) additionally has a plurality between the sensor element (7). and the oven (3) arranged in series discs (8-10), of which a first disc (8) on the oven (3) is mounted and a second disc (9) in the region of an outer side of the insulation (5) attached and wherein the first disc (8) is connected to the second disc (9) via a plurality of rods (15).

Description

The invention relates to a baking oven, comprising a baking tube provided on the outside with a heat-insulating insulation, an opening leading through the oven and the insulation, a sensor device having at least one sensor element which is arranged outside the oven and the insulation and directed through the opening into the oven is, wherein the sensor device additionally comprises a plurality of arranged between the sensor element and the oven in series slices. The invention is particularly advantageously applicable to ovens with high temperature cleaning function, e.g. with pyrolysis function.

In the case of sensor devices which are arranged on a baking tube of a baking oven, the problem typically arises that the sensor element of the sensor device is also heated when the oven is heated. As a result, the temperatures on the sensor element can rise so high that it has to be switched off in order to avoid overheating. This is particularly critical if the temperatures in the oven are above 300 ° C. In particular, in self-cleaning operations, the temperatures in the oven or a cooking chamber limited by the oven over 450 ° C, or even over 500 ° C, reach.

In order to avoid overheating of the sensor element, a plurality of spaced-apart disks arranged in series between the sensor element and the oven can be provided, between which air cushions result. This can lead to the sensor device becoming bulky, which is disadvantageous due to a restricted installation space in ovens. Also, the sensor device can be cooled by means of an air flow, which also cools a furnace electronics. However, disadvantageously a cooling effect is often not sufficient.

WO 2015/185211 A2 discloses a heat treatment monitoring system comprising a heat treatment apparatus comprising a heat treatment chamber and at least one light source fixture for mounting a light source for illuminating the inside of the heat treatment chamber; and a monitoring device comprising a camera, a camera light source and a mounting part, wherein the mounting part is adapted to be detachably attached to the light source mounting.

It is the object of the present invention to overcome the disadvantages of the prior art, at least in part, and in particular to provide a sensor device which, in a compact design, has improved heat separation compared to a back tube.

This object is achieved according to the features of the independent claims. Advantageous embodiments are the subject of the dependent claims, the description and the drawings.

The object is achieved by a baking oven having a baking pipe provided on the outside with a heat-insulating insulation, an opening leading through the baking pipe and the insulation, and a sensor device having at least one sensor element which is arranged outside the baking pipe and the insulation and through the opening into the oven In addition, the sensor device has a plurality of arranged between the sensor element and the oven in-line panes, of which a first disc is attached to the oven and a second disc is mounted in the region of an outer side of the insulation and wherein the first disc with the second disc is connected via several rods.

This oven has the advantage that a heat conduction from the first, comparatively strongly heating disc to the second disc can be significantly reduced compared to a tubular connection without increasing a size. Because only the cross sections of the rods are available for a heat flow, which can be implemented very small compared to a pipe. In this case, hot air from the cooking chamber can not get past the first disc to the second disc, since the opening is covered by the first disc. By the first disc, the second disc and the inner wall of the insulation in the region of the opening rather an air-filled chamber is generated, which is good thermal insulation.

The rod can also be used as a rod or similar. be designated. The rod may be full (voluminous) or hollow on the inside (e.g., in the form of a thin tube). It is a development that the rods are straight. However, they may in principle also be curved, e.g. helically curved. Between the bars are in particular open areas.

The oven can be a pure oven or an oven / hob combination. The oven may also have one or more additional cooking functions such as a microwave function, a steam cooking function. The oven is in particular a household oven. The oven can also be referred to as cooking space.

It is a further development that the oven has a high-temperature cleaning function, in particular a pyrolysis function. In this case, the present invention can be used particularly advantageously, since in a high-temperature cleaning process particularly high temperatures in the oven result and the at least one sensor element due to the pursuit even at such elevated temperatures (which can often reach 450 ° C or 500 ° C) not damaged, even in operation.

The thermal insulation may e.g. Mineral wool, hard foam, etc. be. The insulating insulation is arranged in particular like a sheet on the oven and surrounds the oven in particular a large area.

The leading through the oven and the insulation opening is particularly cylindrical.

It is a development that the at least one sensor element has or is at least one optical sensor element, that is, it senses or senses radiation emerging from the cooking chamber and passing through the panes. The at least one sensor element may comprise at least one IR sensor, e.g. at least one PIR sensor or at least one thermopile. The at least one sensor element may additionally or alternatively comprise at least one visible light-sensing sensor, e.g. a camera sensor such as a CCD sensor, etc. Radiation exiting from the cooking chamber can then fall into the sensor after passing through the discs. Images captured by the camera or the camera sensor may be used, for example, to control a cooking process and / or be displayed on a screen, e.g. on a screen of the oven and / or a smartphone etc.

The fact that the at least one sensor element is arranged outside the baking tube and the insulation comprises in particular that it is arranged between the insulation and an outer housing of the oven.

The fact that the at least one sensor element is directed through the opening into the oven includes, in particular, that the oven is in the field of view of the sensor element.

The fact that the first pane is attached to the oven includes, in particular, that the first pane - if it is equipped with a holder - is fastened to the oven via its holder. In particular, it is airtight attached to the oven to avoid parasitic air currents from the oven to the first disc or its holder over. The first disc thus closes the opening against the furnace chamber airtight.

The fact that the second disc is mounted in the region of an outer side of the insulation, comprises in particular that the second disc - if it is equipped with a holder, the holder - rests on the insulation. In particular, it is airtight mounted on the oven to avoid parasitic air flows of air from the region of the opening on the second disc or its holder over in a housing area outside the insulation.

It is a development that the oven has a the oven at least around the opening spaced around surrounding intermediate wall and the insulation between the oven and the intermediate wall is present, in particular completely fills this gap. In this case, the second disc or its holder may be attached to the intermediate wall. This results in the advantage that the second disc is particularly stable and positionally accurate fastened.

It is a development that the rods are spaced from each other. It is an embodiment that the first disc is connected to the second disc via a plurality of mutually parallel rods. This results in the advantage of a particularly simple and inexpensive production and a particularly robust construction.

In principle, the rods can also be crossed, in particular connected to one another. The multiple rods may also take a grid-like form.

It is a development that the rods consist of a thermally poorly conductive material, in particular with a thermal conductivity W of less than 30 W / (m · K), in particular less than 15 W / (m · K), in particular less than 10 W / (m · K), in particular less than 5 W / (m · K), in particular less than 3 W / (m · K), in particular less than 2 W / (m · K), in particular of less than 1 W / (m · K).

It is a development that the rods are made of a high temperature resistant material, in particular with a heat resistance of at least 300 ° C, in particular of at least 400 ° C, in particular of at least 450 ° C, in particular of at least 500 ° C.

It is an embodiment that the rods are made of ceramic. Ceramic has the advantages of high heat resistance, high chemical inertness, potentially low thermal conductivity and high rigidity. Possible Ceramics may comprise or consist of, for example, porous aluminum oxide, silicon nitride, zirconium oxide or silicate ceramics. However, in principle, rods made of other materials may be used, in particular of non-metallic material, for example of plastic such as PTFE, PEEK, etc.

It is an embodiment that the first disc is inserted at the edge into a first annular retaining ring. This advantageously facilitates attachment of the first disc. In particular, the first disc may be airtight connected to the first retaining ring. It is an embodiment that the rods are attached to the first retaining ring. This results in the advantage that the rods can be arranged particularly firmly and precisely positioned relative to the first disc.

It is an embodiment that the second disc is inserted at the edge into a second annular retaining ring. This advantageously facilitates attachment of the first disc. In particular, the second disc may be airtight connected to the second retaining ring. It is an embodiment that the rods are attached to the second retaining ring. This results in the advantage that the rods can be arranged particularly firmly and precisely positioned relative to the second disc.

It is a development that at least the first pane is a glass pane, since this is particularly temperature-resistant and virtually inert to chemical environments. It is a development that the second disc is a glass pane, possibly even more discs, in particular all discs. However, the second disc and possibly further discs which are farther from the cooking chamber than the first disc (that is to say located "behind" the first disc) can also be made of plastic. This may be the case in particular if the ambient temperatures of these discs do not exceed 260 ° C. The disks are permeable to radiation emerging as the cooking chamber (visible light and / or IR light) at least in a part of the spectral range for which the at least one sensor is sensitive. The discs may be in particular transparent discs. At least one disc may be beamforming, e.g. as a lens. At least one disc may not be beamformed and then serve as a viewing window.

It is an embodiment that the sensor device is loosely surrounded by the height of the insulation of a sleeve inserted into the opening. The sleeve is particularly reliable in preventing foreign bodies (e.g., insulation fibers) from penetrating through between the rods into the space between the first disc and the second disc. The fact that the sensor device is loosely surrounded by the sleeve, gives the advantage that a heat input from the sleeve to the sensor device can be kept low or even practically avoided altogether. The fact that the sensor device is loosely surrounded by the sleeve, may include that the sleeve is only selectively and then only slightly connected to the sensor device, in particular with the rods and / or the disc holders. The fact that the sensor device is loosely surrounded by the sleeve can also include that the sleeve does not touch the sensor device and is thus arranged at a distance from the sensor device.

It is an embodiment that the sleeve is made of a high-temperature resistant and thermally poorly conductive material, in particular of ceramic. Thus, a heat conduction from the oven or cooking chamber is further reduced.

It is an embodiment that the second disc is arranged on a ("front") front side of a tubular housing of the sensor device, in an interior of the housing, a third disc is inserted and the at least one sensor element in the housing on a back pipe opposite side of the third disc is arranged. As a result, the advantage is achieved that the at least one sensor element is even more effectively protected from heat. Thus, through the interior of the housing, the second disc and the third disc another air-filled thermally insulating space is provided. In particular, the second disc and the third disc close off a portion of the tubular housing which is limited by them.

It is a development that the tubular housing consists of a high-temperature resistant and thermally poorly conductive material, in particular ceramic. The sensor housing may be a rectilinear and / or a curved tube. A cross section may be circular, oval or angular, e.g. square, be.

It is an embodiment that the oven has a fan and is adapted to blow air in the back tube facing away from the back of the tubular housing. Thus, cooling air can be directed to the at least one sensor element in a structurally simple and compact manner in order to cool it more effectively. The fan may be arranged remotely from the tubular housing and be connected to the front pipe facing away from the end wall via a hose, a pipe or another air duct. Alternatively, the fan may be arranged in the region of the end face facing away from the baking tube.

It is an amplifying an air flow generated by the fan, which flows around the at least one sensor element, advantageous embodiment that the housing laterally of the at least one sensor element or in front of the at least one sensor element has at least one air passage opening. Through the air passage opening blown in cooling air can be blown out frontally. The fact that the housing has at least one air passage opening "in front of" the at least one sensor element may include that this at least one air passage opening is located at a height of the housing between the at least one sensor element and the third disk.

It is an embodiment that the housing is airtight at an altitude between the second disc and the at least one sensor element surrounded by a transverse to a longitudinal extension of the housing extending air guide and the oven has a fan and is adapted to air transverse to the longitudinal extent of the housing in a region between the air guide plate and the insulation to flow past the housing. This provides the advantage that the portion of the tubular housing is effectively cooled from the outside by the passing air.

It is a further development that the housing has another air guide plate extending transversely to a longitudinal extension of the housing, which is further away from the oven than the above air guide plate. The air baffle advantageously extends at least approximately parallel to the above air baffle. This results in the advantage that the air flow can be passed once again past the housing transversely to the longitudinal extension of the housing.

The fan configured to blow air into the rear face of the tubular housing and the fan configured to allow air to flow past the housing transversely may be different fans or the same fan. In particular, the fan, is adapted to let air flow past the housing transversely, then also serve to cool a device electronics and / or to allow door ventilation.

It is an embodiment that the sensor device has at least one additional functional element in a section between the at least one sensor element and the baking tube. This can improve thermal protection, expand functionality and / or increase user-friendliness.

It is an embodiment that the at least one additional functional element has a controllable diaphragm, which is arranged on the side of the garage adjacent to the first pane. An opening state of the shutter (open, closed, or partially closed) can thus be controlled by the oven. This results in the advantage that the sensor device can be better protected against the cooking chamber. Thus, a closed or partially closed aperture provides improved protection against heat and additionally prevents vapors or splashes of food from being able to deposit on the first pane when the sensor device is not in use.

It is an embodiment of the invention that the screen is provided on its side facing the first disk with a cleaning device (for example a cleaning fleece or a windshield wiper, etc.) which contacts the first disk when the shutter is closed or partially closed. Thus, by a - possibly repeated - opening and closing movement of the diaphragm, the first disc on its back-chamber-side surface to be cleaned.

It is also an embodiment that the at least one additional functional element has or is a metal grid, which is arranged on the side of the garnish adjacent to the first pane. The metal grid (e.g., a wireframe or sheet metal grid) provides the further advantage that spatter can make the first slice harder to reach. In addition, the metal grid may be microwave-tight, e.g. if the oven additionally has a microwave functionality.

It is a development that at least one additional functional element is a layer of amorphous silicon dioxide, in particular airgel. Such a layer may in particular be arranged between two panes or between a pane and the at least one sensor element.

It is a further development that at least one of the discs is coated, e.g. has an IR-reflective coating. Thus, a heat transfer to the at least one sensor element can be further reduced.

It is a development that at least one functional element is a Lichtpolarisator or a spectral filter. In particular, at least one of the disks can be configured as a light polarizer or spectral filter.

It is a development that at least one of the panes is mirrored or anti-reflective or at least partially reflective acts.

It is a training that creates a gap between two disks as a vacuum space is formed, which allows a particularly effective thermal insulation.

It is an embodiment that the sensor device is modularly composed of several interchangeable modules. Thus, the advantage is achieved that the sensor device is simply structurally changeable, e.g. at the factory or even at an end user, e.g. by a service technician. This also facilitates replacement of worn or defective components.

It is an embodiment of a first module having the first disk, a second module having the second disk and / or a third module corresponding to the housing. If, for example, the first pane no longer has sufficient transparency for the light to be detected, it can easily be replaced.

It is a development that the housing is partially subdivided along the longitudinal extension into several modules. This gives e.g. the advantage that the baffles can be clamped for tight connection to the housing between these modules. For this purpose, the modules may have notches in the region of the air baffles in order to contact the modules over the entire surface of the air baffles.

The additional functional units or functional elements can also be designed as modules.

It is a development that the rods are further back through the second holder and continue through other modules. This has the advantage that the rods can also serve as fixing elements and / or assembly and position aids for these other modules.

• 1 zeigt als Schnittdarstellung in Seitenansicht eine ausschnittsweise Skizze eines Backofens mit einer daran angeordneten Sensoreinrichtung;
• 2 zeigt einen Ausschnitt aus der Sensoreinrichtung in Schrägansicht; und
• 3 zeigt als Schnittdarstellung in Schrägansicht einen Ausschnitt des Backofens mit der daran angeordneten Sensoreinrichtung.

The above-described characteristics, features and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following schematic description of an embodiment which will be described in detail in conjunction with the drawings.

• 1 shows a sectional side view of a fragmentary sketch of a baking oven with a sensor device arranged thereon;
• 2 shows a section of the sensor device in an oblique view; and
• 3 shows a sectional view in an oblique view of a section of the oven with the sensor device arranged thereon.

1 shows a sectional view in side view of a section of an oven 1 with a sensor device arranged thereon 2 , 2 shows a section of the sensor device 2 in an oblique view. 3 shows a sectional view in an oblique view of a section of the oven 1 with the sensor device arranged thereon 2 ,

The oven 1 has a stovepipe 3 on, that a cooking space 4 encloses. The oven 3 is outside - ie, at its the cooking space 4 opposite side - with a heat-insulating insulation 5 Provided. Through the oven 3 and the insulation 5 leads an opening 6 ,

The sensor device 2 has a sensor element in the form of a camera 7 on, whose field of vision through the opening 6 in the oven 4 is directed. The camera 7 is outside the oven 3 and the insulation 6 arranged. The sensor device 2 additionally has several between the camera 7 and the cooking space 4 slices arranged in series 8th . 9 . 10 made of glass, of which a first disc 8th on the oven 3 attached and a second disc 9 in the area of an outside of the insulation 5 is appropriate.

The first disc 8th is to its holder peripherally circumferentially in a first support ring 11 airtight edged. The second disc 9 is to its holder peripherally circumferentially in a second retaining ring 12 airtight edged. The first retaining ring 11 is on the inside of the oven 3 attached, with the first disc 8th then in the oven 4 can be located. The first retaining ring 11 and the first disc 8th seal the opening 6 against the cooking space 4 from.

The second retaining ring 12 is on an outside to the oven 3 spaced extending partition 13 attached. The area between the oven 3 and the partition 13 is with the insulation 5 filled. The second retaining ring 12 and the second disc 9 seal the cooking space 4 opposite mouth of the opening 6 from.

Through the insulation 5 , the first disc 8th with bracket 11 and the second disc 9 with bracket 12 becomes an air-filled space 14 formed, providing thermal insulation between the first disc 8th and the second disc 9 provides.

To create a heat flow between the first disc 8th with the first bracket 11 on the one hand and the second disc on the other 9 with the second bracket 12 To keep particularly low, is the first disc 8th with the second disc 9 over the brackets 11 and 12 by means of several rods 15 connected. The bars 15 are on the brackets 11 and 12 attached, in such a way that the bars 15 perpendicular to the discs 8th and 9 and parallel to a longitudinal extent L the sensor device 2 run. The bars 15 run parallel to each other and are on the retaining rings 11 . 12 arranged equidistantly in the circumferential direction. The bars 15 here are straight rods 15 made of ceramic.

The sensor device 2 can about the height of the insulation 5 loose from one in the opening 6 inserted sleeve 16 be surrounded, as indicated by dashed lines. The sleeve 16 For example, it is made of ceramic and separates the insulation 5 from the gap 14 from.

The second disc is also on one of the oven 3 facing end face of a tubular housing 17 the sensor device 2 arranged. The housing 17 is with its longitudinal axis along the longitudinal extent L the sensor device 2 aligned. In an interior 18 of the housing 17 is the third disc 10 so used that they the interior 18 crosses. The third disc 10 is in particular airtight in the housing 17 used. Through the case, the second disc 9 with bracket 12 and the third disc 10 becomes a second air-filled, heat-insulating space 19 educated. The camera 7 is in the case 17 on one of the oven 3 opposite side of the third disc 10 arranged. The camera 7 So it's through the two spaces 14 and 15 opposite the cooking chamber 4 thermally insulated.

To a thermal load on the camera 5 even lower, the oven can 1 a fan 20 and be adapted to cool air in the oven 3 opposite end face 21 the tubular housing 17 to blow. This is the fan 20 here at the front 21 arranged. It can be suction side with an interior of the oven 1 be connected or with an environment of the oven 1 be connected, for example via a hose leading to the outside o.ä. (not shown). To a particularly strong air flow S1 in place of the camera 7 to generate, the housing has 17 several laterally of the camera 7 introduced air passage openings 22 on.

For even more effective cooling of the sensor device 2 can the case 17 at a height between the second disc 9 and the camera 7 airtight from one transverse to a longitudinal extent L of the housing 17 extending air baffle 23 be surrounded. The air baffle 23 extends here at least approximately parallel to the intermediate wall 13 , The oven 1 has another fan (o. Fig.), By means of which an air flow S2 transverse to the longitudinal extent of the housing 17 in an area between the air baffle 23 and the insulation 5 or the intermediate wall 13 on the housing 17 let flow by.

The housing 17 Another may be transverse to a longitudinal extent L of the housing 17 extending air baffle 24 further from the oven 3 is removed as the air baffle 23 , The air baffle 24 extends here at least approximately parallel to the air baffle 23 , By means of the further fan, the air flow S2 so transversely to the longitudinal extent of the housing 17 once again on the case 17 be passed.

The sensor device 2 For example, an additional functional element in the form of a motor-operated, selectively opening and closing shutter or aperture 25 respectively. The aperture 25 is in the oven 4 Garraumseitig adjacent to the first disc 8th arranged. The aperture 25 can at its the first disc 8th facing side be provided with a cleaning device, the closed disc or partially closed aperture the first disc 8th contacted. By possibly repeated opening and closing the garraumseitige surface of the first disc 8th be cleaned that way. Instead of or in addition to the panel can garraumseitig to the first disc 8th also a metal grid 26 are located.

The sensor device 2 can be modularly composed of several interchangeable modules. In particular, a first module M1 the first disc 8th with bracket 11 have a second module M2 the second disc 9 with bracket 12 and / or a third module M3 the housing 17 correspond as indicated by the dashed lines. The housing 17 can itself again sections along the longitudinal extension into several modules M3-1 . M3-2 and M3-3 be divided. This gives the advantage that the baffles 23 and 24 for tight connection to the housing 17 between these modules M3-1 . M3-2 and M3-3 can be trapped. This can be done with the modules M3-1 . M3-2 and M3-3 in the area of the air baffles 23 and 24 Have notches to the modules M3-1 . M3-2 and M3-3 outside the baffles 23 and 24 to contact all over. Also the additional functional units or functional elements 20 . 25 . 26 can be designed as modules.

In a variant, the rods can 15 through the second bracket 12 through further backwards, ie, into one of the oven 3 or cooking space 4 direction away, be continued and through other modules, including through the modules M3-1 . M3-2 and possibly M3-3 run (not shown). This results in the advantage that the rods as fixing and / or assembly and position aids for these other modules M3-1 . M3-2 and possibly M3-3 can serve.

Of course, the present invention is not limited to the embodiment shown.

So can the spaces 14 . 19 also be evacuated.

Generally, "on", "an", etc. may be taken to mean a singular or a plurality, in particular in the sense of "at least one" or "one or more" etc., unless this is explicitly excluded, e.g. by the expression "exactly one", etc.

Also, a number may include exactly the specified number as well as a usual tolerance range, as long as this is not explicitly excluded.

LIST OF REFERENCE NUMBERS

1

oven

2

sensor device

3

oven

4

oven

5

insulation

6

opening

7

camera

8th

First disc

9

Second disc

10

Third disc

11

First retaining ring

12

Second retaining ring

13

partition

14

gap

15

pole

16

shell

17

casing

18

inner space

19

gap

20

Fan

21

front

22

Air passage opening

23

Air baffle

24

Air baffle

25

cover

26

metal grid

L

longitudinal extension

S1

airflow

S2

airflow

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2015/185211 A2 [0004]

Claims (15)

Oven (1), in particular pyrolysis oven, having a baking pipe (3) provided on the outside with a heat insulating insulation (5), - One through the oven (3) and the insulation (5) leading opening (6) and a sensor device (2) having at least one sensor element (7) which is arranged outside the baking tube (3) and the insulation (5) and is directed through the opening (6) into the baking tube (3), in which - The sensor device (2) additionally comprises a plurality of between the sensor element (7) and the oven (3) arranged in series discs (8-10), of which a first disc (8) on the oven (3) is mounted and a second Washer (9) is mounted in the region of an outer side of the insulation (5) and wherein - The first disc (8) with the second disc (9) via a plurality of rods (15) is connected. Oven (1) after Claim 1 , wherein the first disc (8) with the second disc (9) via a plurality of mutually parallel rods (15) is connected. Oven (1) according to one of the preceding claims, wherein the first disc (8) is inserted into the edge of a first retaining ring (11) and the rods (15) are fastened to the first retaining ring (11). Oven (1) according to one of the preceding claims, wherein the second disc (9) is inserted into the edge of a second retaining ring (12) and the rods (15) are secured to the second retaining ring (12). Oven (1) according to one of the preceding claims, wherein the rods (15) consist of ceramic. Oven (1) according to one of the preceding claims, wherein the sensor device (2) over the height of the insulation (5) loosely surrounded by a in the opening (6) sleeve (16) is surrounded. Oven (1) after Claim 6 , wherein the sleeve (16) consists of ceramic. Oven (1) according to one of the preceding claims, wherein the second disc (9) is arranged on a front side of a tubular housing (17) of the sensor device (2) facing the back tube (3), - In an interior space (18) of the housing (17), a third disc (10) is inserted and - The at least one sensor element (7) in the housing (17) on a side facing away from the baking tube (3) side of the third disc (10) is arranged. Oven (1) after Claim 8 in which - the oven (1) has a fan (20) and is set up to blow air (S1) into the end face (21) of the tubular housing (17) facing away from the baking tube (3) and - the housing (17) has at least one air passage opening (6) laterally of the at least one sensor element (7) or in front of the at least one sensor element (7). Oven (1) after one of Claims 8 to 9 in which - the housing (17) at a height between the second disc (9) and the at least one sensor element (7) is airtight surrounded by a transversely to a longitudinal extent of the housing (17) extending air guide plate (23, 24), and the oven (1) has a fan and is adapted to supply air (S2) transversely to the longitudinal extension (L) of the housing (17) in a region between the air guide plate (23, 24) and the insulation (5) on the housing ( 17) to let flow past. Oven (1) according to one of the preceding claims, wherein the sensor device (2) has at least one additional functional element (25, 26) in a section between the at least one sensor element (7) and a cooking chamber (4) bounded by the baking tube (3) , Oven (1) after Claim 11 wherein the at least one additional functional element has a controllable diaphragm (25), which is arranged on the side of the garage adjacent to the first disc (8). Oven (1) after Claim 12 , wherein the diaphragm (25) is provided on its side facing the first disc (8) with a cleaning device which contacts the first disc (8) when the diaphragm (25) is closed or partially closed. Oven (1) after one of Claims 11 to 13 wherein the at least one additional functional element comprises a metal grid (26), which is arranged on the garage side adjacent to the first pane (8). Oven (1) according to one of the preceding claims, wherein the sensor device (2) is modularly composed of a plurality of exchangeable modules (M1, M2, M3, M3-1, M3-2, M3-3) and a first module (M1) first disc (8), a second module (M2) has the second disc (9) and / or a third module (M3, M3-1, M3-2, M3-3) at least a portion of the housing (17) corresponds.

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