DEVICE FOR TREATING VAPORS

Abstract

A device for treating vapors includes a fluid-tight container that has a vapor inlet, a vapor outlet and a through-flow connection which connects the vapor inlet to the vapor outlet in particular along a direction of flow, wherein the container can be at least partially filled with a cooling fluid.

Claims

1-6. (canceled)

7. A device for treating vapors, comprising: a fluid-tight container, which can be filled with a cooling fluid at least in some regions, the fluid container comprising: a vapor inlet; a vapor outlet; and a through-flow connection which connects the vapor inlet to the vapor outlet; and at least one sensor for detecting at least one parameter of at least one of a vapor flow and a coolant in the container; wherein the sensor is connected in a signal-transmitting manner to a control device for controlling the addition of cooling fluid to at least one of the container of the device and to a control device for controlling the extracted volume flow.

8. The device according to claim 1, wherein at least one of a temperature sensor and a humidity sensor and a conductivity sensor and a volume flow sensor serves as a sensor.

9-11. (canceled)

12. The device for treating vapors according to claim 1, wherein at least one cooling member in the form of a solid body is arranged in the container.

13. The device according to claim 12, wherein a cooling plate serves as cooling member.

14. The device according to claim 12, wherein the cooling member is liquid-cooled.

15. The device according to claim 12, comprising an inlet through which cooling fluid can be applied to the cooling member.

16. The device according to claim 12, wherein the cooling member in each case has one or more defined outlets for draining cooling fluid into the bottom tray of the container.

17. The device according to claim 12, wherein the at least one cooling member has a respective overflow edge.

18-20. (canceled)

21. The device according to claim 1, comprising a control device by means of which an addition of cooling fluid to the container can be controlled.

22. The device according to claim 1, wherein the through-flow connection has a flow cross-section increasing in the direction of flow.

23. An apparatus for cleaning vapors comprising: a device for treating vapor according to claim 1; and a fan for applying negative pressure to the container.

24. The apparatus for cleaning vapors according to claim 23, wherein the sensor is connected in a signal-transmitting manner to a control device for controlling the volume flow that is extracted by the fan.

25. The apparatus for cleaning vapors according to claim 23 further comprising: at least one filter device, which is connected to the device in a fluid-conducting manner and which is arranged downstream from the vapor outlet of the device.

26-54. (canceled)

55. A kitchen appliance comprising a device for treating vapors according to claim 1.

56. A kitchen appliance comprising an apparatus for cleaning vapors according to claim 23.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0273] FIG. 1 shows a schematic sectional illustration of a cooking appliance with a controllable ventilation device in a first functional mode,

[0274] FIG. 2 shows an illustration according to FIG. 1 in a second functional mode,

[0275] FIG. 3 shows an illustration according to FIG. 1 in a third functional mode,

[0276] FIG. 4 shows a schematic, partial side view of a cooking space that is arranged in a housing and a device for treating vapors that is connected thereto in a fluid-conducting manner,

[0277] FIG. 5 shows a perspective view of a device for treating vapors according to FIG. 4,

[0278] FIG. 6 an exploded image of the device for treating vapors according to FIG. 5,

[0279] FIG. 7 shows an illustration of a bottom tray of the device for treating vapors according to FIG. 5,

[0280] FIG. 8 shows an illustration of a cooling plate that is arranged in the device for treating vapors,

[0281] FIG. 9 shows an illustration of an alternative embodiment of a bottom tray of a device for treating vapors,

[0282] FIG. 10 shows an illustration of a lid having a meander structure for a device for treating vapors,

[0283] FIG. 11 shows a schematic illustration explaining flow paths in a cooling fluid in the bottom tray of a device for treating vapors,

[0284] FIG. 12 shows a cross-section through a device for treating vapors,

[0285] FIG. 13 shows a schematic illustration explaining the operating principle of a device for treating vapors,

[0286] FIGS. 14 and 15 shows perspective views of a connecting piece for connecting a cooking space of the cooking appliance to a device for treating vapors,

[0287] FIG. 16 shows a schematic sectional view of a hob system designed as an assembly unit with a device for treating vapors, and

[0288] FIG. 17 shows a schematic illustration of a device for extracting cooking fumes with a modular device for treating vapors and a base fan.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0289] In the following, a possible construction and components of an apparatus for heating cooking products are described as an example. It is therefore referred to in the following as cooking appliance 1. In particular, it can be a pressureless cooking appliance. In particular, it may be a baking oven, a steam cooker, a combination steam cooker, i.e. a baking oven with a steam cooking function, a microwave oven or a combined appliance having a selection from the aforementioned functions.

[0290] The cooking appliance 1 has a housing 2. The housing 2 surrounds a receiving space 3 for receiving the cooking product to be heated. The receiving space 3 is also referred to as the cooking space.

[0291] The housing 2 can be essentially cuboid-shaped. In particular, it can have a front side 4 and a rear side 5. In particular, it has a bottom 6 and a top 7. It also has side walls.

[0292] The housing 2 has, in particular, a closable opening 8 for loading the receiving space 3 with cooking products. The opening 8 can be closed by means of a closure member, in particular in the form of a door 9. The door 9 is in particular a hinged door. The door can in particular be pivoted about a pivot axis 10. The pivot axis 10 is preferably located in the lower region of the door 9 when it is closed. Alternative arrangements of the door 9 and alternative embodiments of the closure element are possible.

[0293] In addition to and separate from the opening 8 for loading the receiving space 3 with cooking products, the housing 2 has a fresh air inlet 11 and an exhaust air outlet 12.

[0294] The fresh air inlet 11 is preferably arranged in the region of the front side 4 of the housing 2.

[0295] The exhaust air outlet 12 is preferably located in the region of the rear side 5 or in the region of a side wall of the housing 2.

[0296] The cooking appliance 1 also comprises a heating device 13, which is only shown schematically in the figures. The heating device 13 servers for direct or indirect transfer of thermal energy to the cooking products to be heated. The heating device 13 may have one or more heating members. The heating members may be arranged inside the receiving space 3 or outside the same. Corresponding alternatives are known from the prior art, for example from DE 101 58 425 C1.

[0297] The cooking appliance 1 has a means for generating a circulating air flow in the receiving space 3. This means for generating a circulating air flow is shown schematically in the figures as a fan wheel 14. It can preferably be arranged in the region of the rear side of the receiving space 3.

[0298] In addition, the cooking appliance 1 comprises a ventilation device. The ventilation device can have a plurality of functions. On the one hand, it can serve to generate an air flow for cooling certain components of the cooking appliance 1. On the other hand, it may serve to control the ventilation of the receiving space 3. According to the invention, these functions can be realized by means of a single ventilation device. According to an alternative not shown in the figures, it is also possible to provide at least partially separate ventilation devices for the different functions.

[0299] The ventilation device comprises at least one fan 15, which is only shown schematically in the figures. A radial fan is preferably used as the fan. Alternatively, an axial or cross-flow fan can also be used as a fan. A combination of different fans is also possible. In particular, the ventilation device may comprise a single fan 15 or a single fan unit with one or more fans. For example, it is possible to arrange a plurality of fans next to each other in a single fan unit. This can reduce the installation space required for the fan unit, in particular the overall height. In addition, such a fan unit can be controlled in a particularly flexible manner.

[0300] The fan 15 is preferably arranged in the region of the exhaust air outlet 12.

[0301] The fan 15 serves to generate a volume flow V (here V denotes the volume flow dV/dt. The volume flow V that can be generated by means of the fan 15 is in the range of up to 50 m.sup.3/h, in particular in the range of up to 100 m.sup.3/h, in particular in the range of up to 200 m.sup.3/h, in particular in the range of up to 300 m.sup.3/h, in particular in the range of up to 500 m.sup.3/h.

[0302] Furthermore, the ventilation device comprises a flow guiding system 16. The flow guiding system 16 comprises a first sub-system for guiding a flow with cooling air 17. The cooling air 17 is formed in particular by fresh air sucked into the housing 2 through the fresh air inlet 11.

[0303] The cooling air 17 is guided in a meandering manner through the flow guiding system 16. In particular, starting from the fresh air inlet 11, it is first guided from the front side 4 of the housing 2 along the upper side of the receiving space 3 into the rear region of the housing 2. It is then deflected and guided back into the region of the front side 4 of the housing 2. There it is diverted again and guided to the exhaust air outlet 12 at the rear side 5 of the housing 2. A larger number of deflections, in particular a larger number of meander loops, is also possible.

[0304] The cooling air 17 is fed into the flow guiding system 16, in particular from the front. The exhaust air 18 is fed into the flow guiding system 16, in particular from the rear.

[0305] To minimize the pressure loss in the flow guiding system 16, preferably as few deflections as possible are provided and the flow paths are designed as short as possible.

[0306] The cooling air flow is shown schematically in the figures by solid arrows.

[0307] Further, the flow guiding system 16 comprises a sub-system for guiding a flow of exhaust air 18 extracted from the receiving space 3. The exhaust air flow is schematically represented by dashed arrows in the figures.

[0308] The cooling air 17 drawn in through the fresh air inlet 11 can be fed to the region of the flow guiding system 16 with the flow of the extracted exhaust air 18 via a feed opening 33.

[0309] The flow guiding system 16 thus serves to guide the air flow with the fresh air that is sucked into the housing 2 and/or to guide the air flow with exhaust air 18 that is extracted from the receiving space 3.

[0310] The two sub-systems partially overlap. In particular, it is provided to feed the air flow with the cooling air 17 in a controlled manner to the air flow of the exhaust air 18 that is extracted from the receiving space 3.

[0311] To control the air flows in the housing 2, the ventilation device has a control means for controlling the extraction of the exhaust air 18 from the receiving space 3. In particular, a controllable valve 19 can serve as a control means for controlling the extraction of the exhaust air 18 from the receiving space 3. The valve 19 is arranged in the region of a fluid outlet 20 in the bottom of the receiving space 3.

[0312] On the downstream side of the fluid outlet 20, a device for condensing water vapor that is contained in the exhaust air that is extracted from the receiving space 3 is arranged. The condensation device 28 may comprise a channel system with meandering channels. Cooling water 29 may be arranged in the channel system. A fresh water inlet 30 serves to fill the condensation device 28 with cooling water 29. A waste water pipe 31 serves to empty the condensation device 28. The condensation device 28 generally forms a device 40 for treating vapors.

[0313] The fresh water inlet 30 and the waste water pipe 31 are only shown schematically in the figures. Together they are referred to as the mains water connection. The mains water connection can also be used to clean the receiving space 3. For this purpose, the cooking appliance 1 may have a special cleaning programme. This enables automated cleaning of the receiving space 3.

[0314] For details of the condensation device 28, reference is made to DE 10 2008 012 961 A1 by way of example.

[0315] The control means for controlling the extraction of the exhaust air 18 from the receiving space 3 is connected in a signal-transmitting manner to a central control device 21. The central control device 21 is arranged in an encapsulated electronics housing 22. The electronics housing 22 is designed to be encapsulated, in particular liquid-tight, in particular vapor-tight. The electronics housing 22 is arranged in particular in the flow guiding system 16, in particular in the sub-system for guiding the cooling air 17. The cooling air 17 thus serves to cool the electronics housing 22, in particular the electrical and/or electronic components arranged therein. All electrical and electronic components for controlling the cooking appliance 1 can be arranged in the electronics housing 22.

[0316] As shown in the figures, the electronics housing 22 can be arranged above the receiving space 3, in particular in the region of the top 7 of the housing 2. Alternatively, it is possible to arrange the electronics housing 22 laterally, behind or below the receiving space 3, in particular in the region of the bottom 6 of the housing 2. This can provide improved protection against overheating of the electrical and/or electronic components.

[0317] The ventilation device further comprises a control means for controlling the supply of fresh air to the receiving space 3. A ventilation flap 23 or a valve or, in general, an actuating member, in particular a controllable actuating member, serves as the control means for controlling the supply of fresh air to the receiving space 3.

[0318] The ventilation flap 23 can be used to close a fresh air opening 11 through which fresh air can be fed to the receiving space 3. Fresh air can be fed to the receiving space 3 from the rear side of the appliance. The fresh air that is fed to the receiving space 3 can in particular be supplied from the rear side of the appliance without a guide. In particular, it can be supplied via a flow path which is not in flow connection with the fresh air inlet 11. The fresh air that is supplied to the receiving space 3 is in particular independent of the cooling air 17 that is drawn in through the fresh air inlet 11.

[0319] The control means for controlling the supply of fresh air to the receiving space 3 is connected to the central control device 21 in a signal-transmitting manner.

[0320] The control means for controlling the supply of fresh air to the receiving space 3 is arranged, for example, in the region of the rear side of the receiving space 3. Other arrangements are also possible.

[0321] Furthermore, the ventilation device comprises at least one control means for controlling the supply of the air flow of the cooling air 17 that is sucked into the housing 2 to the air flow of the exhaust air 18 that is extracted from the receiving space 3. This control means is preferably designed as an adjustable flap 24. It can also be designed as a valve, in particular a multi-way valve, in particular comprising at least two inlets and one outlet.

[0322] The closure flap 24 is connected to the central control device 21 in a signal-transmitting manner.

[0323] Preferably, all control means of the ventilation device are directly or indirectly coupled with each other. They are preferably all connected to the central control device 21 in a signal-transmitting manner.

[0324] Furthermore, the cooking appliance 1, in particular the ventilation device, comprises a means for cleaning exhaust air. A filter module 25 serves as the means for cleaning exhaust air. The filter module 25 comprises in particular an odor filter. In particular, it comprises an activated carbon filter. It may also comprise a grease filter and/or further filters. The filter module 25 is arranged in particular in the region of the front side 4 of the cooking appliance 1. It is arranged in particular behind a removable front panel 26.

[0325] The filter module 25 is preferably removable from the housing 2. In particular, it can be replaced. In particular, the filter module 25 can be removed from the housing 2 without tools. This facilitates the replacement of the filter module 25.

[0326] The filter module 25 is arranged in the flow guiding system 16 in such a manner that both the exhaust air 18 and the cooling air 17 pass through it.

[0327] The filter module 25 is arranged in front of the electronics housing 22 in the direction of flow. Purified air thus flows around the electronics housing 22 during the operation of the cooking appliance 1, in particular during the operation of the ventilation device.

[0328] The filter module 25 is arranged in particular in front of the fan 15 in the direction of flow, i.e. in the negative pressure region of the fan 15. The fan 15 is thus subjected to purified air during the operation of the ventilation device.

[0329] A sensor device 35 can be arranged in the flow guiding system 16 to detect the temperature and/or humidity of the volume flow V 0 that is generated by means of the fan 15. The sensor device 35 is arranged, for example, in the region of the filter module 25. It can also be arranged in the region of the electronics housing 22 or in the region of the fan 15. It is preferably arranged on the upstream side of the fan 15.

[0330] The sensor device 35 is preferably arranged on the downstream side of the feed opening 33, in particular at a distance therefrom.

[0331] The details of the ventilation device and in particular the details of the filter module 25 are advantageous independently of the other details of the cooking appliance 1 and in themselves lead to an improvement of a device for heating cooking products.

[0332] The front panel 26 can in particular have a display and/or an operating device with one or more operating elements. This may in particular be a touch-sensitive display (touch display).

[0333] In particular, the display can have a very heavily tinted front glass (black panel effect). This can be used to ensure that contours between a display, adjacent functional components such as capacitive buttons and a housing or locking pressure are not visible.

[0334] In addition, the cooking appliance 1 comprises a sensor device 27 that is arranged in the receiving space 3. The sensor device 27 comprises at least one sensor for detecting the temperature and/or the humidity in the receiving space 3. The sensor device 27 is connected in a signal-transmitting manner to the central control device 21. With the aid of the sensor device 27, in particular a feedback control of the control means of the ventilation device, in particular of the ventilation flap 23 and/or of the valve 19 and/or of the flap 24 is possible.

[0335] Moreover, the cooking appliance 1 has a device 32, which is also only shown schematically, for controlling the humidity in the receiving space 3. The device 32 for controlling the humidity in the receiving space 3 is preferably connected to the mains water connection.

[0336] Details of the device 40 for treating vapors, its arrangement in the cooking appliance 1 and its operating principle are described below. The details of the device 40 for treating vapors can be independent of the other details of the cooking appliance and can advantageously be used.

[0337] The device 40 for treating vapors can interact with other components of the cooking appliance 1, in particular the ventilation device and/or the filter device with the filter module 25.

[0338] The device 40 for treating vapors comprises a fluid-tight container with a vapor inlet 41 and a vapor outlet 42.

[0339] The container has a bottom tray 43. The bottom tray 43 serves to receive cooling liquid, in particular in the form of cooling water.

[0340] The container has a lid 44.

[0341] The lid 44 can be detachably connected to the bottom tray 43. In particular, it can be latched to the bottom tray 43. For this purpose, latching means are provided on the bottom tray 43 and on the lid 44, in particular in the form of latching tabs 45 with latching lugs and recesses 46 cooperating therewith.

[0342] The latching means can be arranged circumferentially at the bottom tray 43 and at the lid 44.

[0343] Other types of connection are also possible. For example, the lid 44 can also be screwed to the bottom tray 43. A detachable connection between the lid 44 and the bottom tray 43 leads to advantages with regard to cleaning the container and/or in case of repairs.

[0344] The lid 44 and/or the bottom tray 43 can be designed to be profiled. In particular, they can be provided with stiffening struts 59. The stiffening struts 59 can form a hexagonal pattern, for example. The stiffening struts 59 can be used in particular to increase the bending stiffness of the lid 44 and/or the bottom region of the bottom tray 43.

[0345] The bottom tray 43 and/or the lid 44 are made of a fluid-tight material. They are in particular made of a heat-resistant material. The material of the bottom tray 43 and/or the lid 44 is in particular heat-resistant up to temperatures of at least 100 C., in particular at least 200 C., in particular at least 300 C.

[0346] The bottom tray 43 and/or the lid 44 are preferably made of a rustproof material. They are preferably made of an acid-resistant and/or alkali-resistant material.

[0347] The bottom tray 43 and/or the lid 44 can in particular be made at least in some regions, in particular completely, of plastic or of metal, in particular of stainless steel.

[0348] Preferably, the bottom tray 43 and the lid 44 are made of the same material. This ensures that they do not leak due to different coefficients of thermal expansion during the operation of the cooking appliance 1.

[0349] The lid 44 can be made at least in part, in particular completely, of the same material as the receiving space 3 of the cooking appliance 1, in particular its bottom wall. The lid 44 can also be made of a different material than that of the bottom wall of the receiving space 3.

[0350] The container is arranged below the receiving space 3. The receiving space 3 is connected to the vapor inlet 41 via the fluid outlet 20 in a fluid-conducting manner. A connecting piece 47 is provided for the connection between the receiving space 3 and the container of the device 40 for treating vapors.

[0351] There is a space between the container of the device 40, in particular the lid 44 thereof, and the receiving space 3, in particular its bottom. This can be at least partially filled with a heat-insulating material. Air can also serve as a heat-insulating material.

[0352] The receiving space 3 has a bottom which slopes down towards the fluid outlet 20. The bottom of the receiving space 3 can, in particular in some regions, be designed to slope down towards the fluid outlet 20. It can also be horizontal in some regions. Preferably, the fluid outlet 20 is arranged at the lowest point of the receiving space 3.

[0353] The connecting piece 47 has a tubular portion 48. A sieve 49 is arranged at the tubular portion 48. The sieve 49 can in particular be arranged at the end of the tubular portion 48. The sieve 49 can in particular be formed in one piece with the tubular portion 48.

[0354] The sieve 49 is integrated into the connecting piece 47.

[0355] The connecting piece 47 has a circumferential collar 50. The collar 50 forms an abutment shoulder which rests against the bottom of the receiving space 3 when the connecting piece 47 is arranged in the cooking appliance 1. In this case, a sealing member, in particular in the form of a sealing ring 51, is provided between the collar 50 and the bottom of the receiving space 3. The sealing ring 51 is compressible. It seals the connection between the connecting piece 47 and the receiving space 3.

[0356] The connecting piece 47 has latching means 52. The latching means 52 are distributed over the outer circumference of the tubular portion 48, in particular evenly distributed. The latching means 52 can form a bayonet lock. They cooperate with countermeans provided for this purpose at the bottom of the receiving space 3.

[0357] The sieve 49 has a plurality of elongated holes. The sieve 49 may have a hole in the center. The collar 50 may be formed by a protruding edge of the sieve 49.

[0358] The connecting piece 47 is made of plastic, in particular heat-resistant plastic. It is made of heat-resistant plastic, at least in some regions. It can also be made of metal, at least in some regions.

[0359] The connecting piece 47 is preferably made in one piece. However, a multi-part design is possible.

[0360] The tubular portion 48 is in particular circular-cylindrical in shape. It has an outer diameter which is adapted to the inner diameter of the vapor inlet 41.

[0361] A seal, in particular in the form of a sealing ring 53, is provided between the tubular portion 48 and the vapor inlet 41. The sealing ring 53 is integrated in particular in the container of the device 40 for treating vapors. In particular, it may be integrated in the lid 44. The sealing ring 53 allows a sealed connection between the connecting piece 47 and the container of the device 40 for treating vapors. The sealing ring 53 encloses the tubular portion 48 tightly, in particular fluid-tightly.

[0362] The tubular portion 48 is insertable into the container through the vapor inlet 41. It allows a floating connection between the container of the device 40 and the receiving space 3.

[0363] The connecting piece 47 leads to an alignment of the container of the device 40 relative to the receiving space 3.

[0364] The connecting piece 47 has only a small contact surface to the receiving space 3. It can therefore lead to a heat decoupling between the receiving space 3 of the cooking appliance 1 and the container of the device 40.

[0365] The connecting piece 47 can be removed from the inner side of the receiving space 3. In particular, it can be removed without tools. According to one variant, special tools are required to remove the connecting piece 47.

[0366] The sieve 49 is located in the fluid outlet 20 of the receiving space 3.

[0367] The connecting piece 47, in particular the seal with respect to the receiving space 3 and with respect to the container of the device 40, can prevent liquid or vapors from the receiving space 3 or from the device 40 for treating vapors from entering undesired regions of the cooking appliance 1. In particular, this can prevent the cooking appliance 1 from being damaged.

[0368] The connecting piece 47 serves in particular to at least partially, in particular completely, compensate for a temperature-dependent linear expansion of the receiving space 3. This ensures that the connection from the receiving space 3 to the container of the device 40 is always fluid-tight to the outside. According to a variant not shown, one or more flexible means or regions can also be provided for this purpose in the connecting element between the receiving space 3 and the device 40 and/or in the region of its arrangement in the receiving space 3.

[0369] The fluid outlet 20 can be arranged in the front half, in particular in the front third, of the receiving space 3. In particular, it is arranged centrally between the side walls of the receiving space 3. This is not mandatory. It can also be arranged at the edge of the receiving space 3.

[0370] The vapor inlet 41 is arranged directly below the fluid outlet 20. The vapor inlet 41 is arranged in particular in vertical alignment with the fluid outlet 20.

[0371] The positioning of the fluid outlet 20 in the receiving space 3 can therefore influence the arrangement of the vapor inlet 41 in the lid 44 of the device 40. This can influence the flow path extending from the vapor inlet 41 to the vapor outlet 42.

[0372] A through-flow connection, which connects the vapor inlet 41 with the vapor outlet 42 along a direction of flow in a fluid-conducting manner, is formed between the bottom tray 43 and the lid 44.

[0373] The container, in particular the bottom tray 43, has rounded edges.

[0374] The vapor outlet 42 protrudes upwards over the vapor inlet 41.

[0375] The vapor outlet 42 serves as a connection for a riser pipe 54.

[0376] The device 40 is coupled to the fan device of the cooking appliance 1 via the riser pipe 54. The riser pipe 54 is in particular a component of the flow guiding system 16. A sensor device 55 comprising one or more sensors for detecting one or more parameters of the vapor flow can be arranged in the riser pipe 54.

[0377] In particular, the sensor device 55 may comprise one or more temperature sensors, one or more humidity sensors, one or more conductivity sensors, one or more volume flow sensors and/or other sensors.

[0378] In particular, electrical, mechanical, chemical or optical sensors can serve as sensors.

[0379] The sensor device 55 is connected in a signal-transmitting manner to a control device not shown in the figures for controlling the device 40 for treating vapors and/or for controlling the ventilation device of the cooking appliance 1 and/or for controlling the heating device 13 of the cooking appliance 1.

[0380] The fluid outlet 20 can be arranged in a lowered region of the receiving space 3. The lowered region can in particular be shaped like a truncated pyramid. In this case, the top surface of the truncated pyramid, which is formed by the bottom wall of the receiving space 3, does not necessarily have to be parallel to the base surface, which is only formed geometrically, but not by a material component. The top surface, in particular the bottom of the receiving space 3, can in particular be designed to slope downwards, in particular towards the fluid outlet 20, at least in portions.

[0381] The recess in the bottom of the receiving space 3 can be covered by means of a cooking space sieve. In particular, the cooking space sieve can be arranged in the receiving space 3 in such a manner that it is flush with the remaining area of the bottom of the receiving space 3 and forms a substantially flat bottom surface. The cooking space sieve retains food residue. It can prevent vortex formation.

[0382] The cooking space sieve is freely removable. This makes it easier to clean. In particular, it can be lifted on one side by pressing on the other side. This can make it easier to remove.

[0383] The cooking space sieve can be designed to be rectangular. It can also be configured to be non-rectangular and trapezoidal. This can ensure a predetermined, clear alignment of the cooking space sieve in the bottom of the receiving space 3.

[0384] The cooking space sieve can be dimensioned in such a manner that its longest side is at least half as large as the free width of the receiving space 3. The longest side of the cooking space sieve is in particular at least as large as 60%, in particular 70%, in particular 80%, in particular 90% of the free width of the receiving space 3. In the direction perpendicular thereto, the cooking space sieve has an extension of at least 5 cm, in particular at least 10 cm, in particular at least 15 cm, in particular at least 20 cm.

[0385] The resulting large sieve surface has proven to be particularly advantageous. It leads to a reduction of flow losses. In addition, the sieve does not clog as quickly.

[0386] The cooking space sieve can be fixed to the bottom of the receiving space. One or more fixing means, for example screws or magnets, can be provided for this purpose.

[0387] A cooling plate 56 is arranged between the bottom tray 43 and the lid 44. The cooling plate 56 is arranged completely in the interior of the container, in particular completely in the bottom tray 43. It can be clamped between the bottom tray 43 and the lid 44.

[0388] The cooling plate 56 has an outer circumference which is adapted, at least in portions, to an inner circumference of the bottom tray 43. In particular, the cooling plate 56 can rest on the edge of a support edge formed in the bottom tray 43.

[0389] The cooling plate 56 has a trough-like design. It has a circumferential overflow edge 57.

[0390] As can be seen in FIG. 8 by way of example, the cooling plate 56 can have two drain openings 75. Generally, the cooling plate 56 has at least one drain opening 75 for draining the cooling liquid.

[0391] A receptacle 77 may be provided on the cooling plate 56 to receive the fresh water inlet 65.

[0392] The drain openings 75 may be located adjacent to the recess 58 for passage of the connecting piece 47.

[0393] The recesses 58 can form overflow openings.

[0394] The cooling plate 56 is configured to be flat in some regions. The individual regions of the cooling plate 56 can be configured to be slanted, in particular sloping, and/or arranged in the bottom tray 43. As a result, a defined drainage direction for cooling water applied to the cooling plate 56 can be achieved.

[0395] Defined bending points 78 can be provided in the cooling plate 56. In particular, the cooling plate 56 can be crowned. In this way, a defined direction of expansion can be specified in the event of thermal expansion. This ensures that an expansion of the cooling plate 56 does not lead to damage of the bottom tray 43 or the lid 44.

[0396] A recess 58 is provided in the cooling plate 56 for the connecting piece 47 to pass through. Preferably, the sealing ring 53 engages in the recess 58. By means of the sealing ring 53, the passage of the connecting piece 57 through the recess 58 can be sealed.

[0397] Alternatively, the recess 58 can also serve to drain cooling water from the cooling plate 56 into the bottom tray 43.

[0398] A circulation pump 60 is arranged in the container of the device 40. The circulation pump 60 serves to circulate cooling liquid in the container, in particular in the bottom tray 43. It generally forms a means for mixing cooling fluid in the container.

[0399] The circulation pump 60 can be arranged in a receptacle provided for this purpose in the lid 44. It preferably has a suction region which is arranged in a pump sump 61 that is formed in the bottom tray 43.

[0400] The pump sump 61 is located in a lowered region 62 relative to the rest of the bottom tray 43. The pump sump 61 may also be formed by the lowered region 62.

[0401] The bottom tray 43 may have a bottom region 66 sloping down towards the lowered region 62. This can be seen, for example, in FIG. 4. In FIG. 7, gradient lines 67 are drawn as an example.

[0402] In particular, the bottom tray 43 can be designed to slope downwards, in particular monotonously, from the region in which cooling liquid passes from the cooling plate 56 through the drain openings 75 into the bottom tray 43 to the lowered region 62.

[0403] The circulation pump 60 has an outlet which leads into the bottom tray 43. The outlet of the circulation pump 60 can open directly into the bottom tray 43 or be guided via a fluid line, in particular in the form of a hose or a pipe, to a specific region of the bottom tray 43. The fluid line from the circulation pump 60 back to the bottom tray 43 can be guided outside the container of the device 40 in some regions.

[0404] Flow-guiding members, for example one or more valves, in particular multi-way valves, can be arranged in the return line from the circulation pump 60 to the bottom tray 43. These are preferably connected to a control device. This makes it possible to control the circulation circuit. In particular, it is possible to form more than one flow path for the circulation circuit.

[0405] In particular, the cooking appliance 1 can have a plurality of circulation circuits with different flow paths. For example, a first flow path can run completely inside the container 40. An alternative flow path can comprise a flow branch outside the container, but no flow region in the receiving space 3. Via the flow branch outside the container, additives, for example fresh water, cleaning agents, in particular antibacterial agents, or other additives can be selectively added to the circulated liquid. Preferably, the flow path of the circulation circuit can be controlled.

[0406] In addition to the container of the device 40, a further circulation circuit may comprise the receiving space 3 of the cooking appliance 1. This circuit can be used for cleaning the receiving space 3. In particular, a corresponding circuit may be used for selective cleaning of the device 40 for treating vapors, in particular of the container thereof, in particular of the bottom tray 43 and/or of the lid 44 and/or of the cooling plate 56. In doing so, the device 40 for treating vapors, in particular the container thereof, can be cleaned at the same time.

[0407] The device 40 may comprise a pump 63 for pumping a fluid, in particular cooling water and/or service water, out of the bottom tray 43.

[0408] In particular, the device 40 may comprise a first pump in the form of the circulation pump 60 and a second pump in the form of the pump 63.

[0409] The two pumps 60, 63 can be arranged next to each other.

[0410] The two pumps 60, 63 can be configured to be essentially identical.

[0411] Instead of two pumps 60, 63, a single pump and a suitable actuator can also be provided. In particular, the pump can switch between a circulation mode and a pump-off mode. This can also be achieved in particular via different positions of the actuator.

[0412] The pump 63 can be arranged in a receptacle provided for this purpose in the lid 44. It preferably has a suction region which is arranged in a pump sump 61 formed in the bottom tray 43. Preferably, the pump sump 61 of the pump 63 is arranged at the lowest point of the bottom tray 43 and/or forms the lowest point thereof.

[0413] One or a plurality of adjustment means, in particular in the form of adjustment screws, can be provided for aligning the bottom tray 43. This can facilitate a precise alignment of the bottom tray 43. In particular, this can ensure that the bottom tray 43 can be precisely aligned irrespective of the specific conditions of the intended installation or mounting location for the cooking appliance 1. With the help of the adjustment means, a targeted alignment of the bottom tray 43 is possible even if the cooking appliance 1 is to be set up on an installation surface that is not perfectly horizontal.

[0414] A filling level sensor 64 can be arranged in the container of the device 40. The filling level sensor 64 is connected in a signal-transmitting manner to a control device for controlling the supply and/or discharge of cooling fluid to the container. The filling level sensor 64 may also be connected in a signal-transmitting manner to the central control device 21 of the cooking appliance 1.

[0415] The device 40 has a mains water connection. The mains water connection can serve to feed cooling fluid, in particular in the form of fresh water, to the container.

[0416] Cooling fluid, in particular in the form of fresh water, can be supplied to the device 40, for example, via the circulation circuit with the circulation pump 60 and/or a specific fresh water inlet 65.

[0417] In principle, it is also possible to supply fresh water via the vapor inlet 41.

[0418] Fresh water in particular can be applied to the cooling plate 56 via the fresh water inlet 65. The fresh water can in particular form a cooling medium for cooling the cooling plate 56.

[0419] It may be provided to detect the temperature of the cooling plate 56 by means of one or a plurality of sensors. These sensors can be connected in a signal-transmitting manner to a control device for controlling the addition of fresh water to the cooling plate 56. In particular, it can be provided that the addition of fresh water to the cooling plate 56 is controlled by sensors. In particular, the addition can take place in dependence on a temperature of the cooling plate 56. For the addition of cooling water to the cooling plate 56, other parameters can also be taken into account, for example the humidity of the extracted vapors and/or the volume flow and/or the functional mode of the fan device.

[0420] The bottom region 66 can be configured to be flat. According to a variant that is exemplarily shown in FIG. 9, the bottom region 66 has protrusions 68. Such protrusions 68 can serve to reduce the volume of liquid in the bottom tray 43 at a given filling level.

[0421] According to the variant shown in FIGS. 6 and 7, the bottom region 66 is configured to be flat, in particular free of flow-guiding members.

[0422] As shown by way of example in FIG. 9, it may be provided to divide the bottom tray 43, in particular starting from the base region 66, into several sub-regions 66.sub.1, 66.sub.2. The sub-regions can be separated from each other by flow-guiding means, in particular in the form of partition walls 69.

[0423] The partition walls 69 can be designed in such a manner that mixing of cooling liquid from different sub-regions 66.sub.i, 66.sub.j with ij is only reduced or completely prevented.

[0424] Generally, the mixing of the cooling fluid is more complete within a given sub-region 66.sub.i than between two different sub-regions 66.sub.i, 66.sub.j with ij.

[0425] In particular, if the bottom tray 43 is subdivided into separate sub-regions 66.sub.i with i=1 . . . n; 2n, in particular n10, in particular n5, in particular n3, multi-stage cooling of the extracted vapors can be achieved. In particular, it is possible to control the temperature of the cooling water in the different regions 66.sub.i separately. In this case, it may be provided to keep the cooling water in the sub-region 66.sub.2, which is closest to the vapor outlet 42, in a lower temperature range than the cooling water in the other sub-regions 66.sub.i, i2, in particular in the sub-region 66.sub.1, which is closest to the vapor inlet 41.

[0426] As illustrated in FIG. 10 by way of example, a meandering structure may be provided in the container of the device 40 to specify a meandering flow path of the vapors through the container.

[0427] The meander structure is formed in particular by flow-guiding means that are inserted into the container, in particular in the form of flow-guiding walls 70. A flow-guiding wall 70 can serve to increase the length of the flow path of the extracted vapors in the container.

[0428] As illustrated in FIG. 10 by way of example, the flow-guiding walls 70 can be arranged on the lid 44 of the container. In particular, they can be formed integrally with the lid 44 of the container or be connected thereto. This is in particular possible for a variant in which the cooling plate 56 is omitted. In a variant with cooling plate 56, the flow-guiding wall 70 is also formed in particular below the cooling plate 56, i.e. in the region between the cooling plate 56 and the bottom tray 43.

[0429] The flow-guiding wall 70 preferably does not extend to the bottom region 66 of the bottom tray 43. In particular, it is spaced apart from the bottom region 66 of the bottom tray 43. The distance of the flow-guiding wall 70 from the bottom region 66 of the bottom tray 43 is preferably less than a filling level of the bottom tray 43 with cooling liquid intended for the operation of the device 40. The flow-guiding wall 70 is in particular designed in such a manner that it is immersed in the cooling liquid, in particular in the region of a free edge, during the operation of the device 40, in particular if the device 40 is filled with cooling liquid up to a predetermined filling level.

[0430] Below the flow-guiding wall 70, the cooling liquid can preferably circulate in the bottom tray, in particular in its bottom region 66 or, in the case of a plurality of sub-regions 66.sub.i, in the latter.

[0431] FIG. 11 schematically shows the flow path of a circulation flow 71 of the cooling liquid in the bottom tray 43.

[0432] Furthermore, FIG. 11 schematically shows the flow path of an external flow branch 72 from the circulation pump 60 back to the bottom tray 43. A flow path 73 to the pump 63 and from there to a waste water pipe 74 is also shown schematically.

[0433] As shown schematically in FIG. 11, the bottom tray 43 is preferably designed without dead zones. With the aid of the circulation pump 60, in particular, a complete mixing of the cooling liquid in the bottom tray 43 can be achieved.

[0434] In the following, the operating principle of the device 40 is described with reference to the schematic FIG. 13. During the operation of the cooking appliance 1, vapors that are produced in the receiving space 3 can escape from the receiving space 3 via the fluid outlet 20. In this case, they enter the container of the device 40 for treating vapors via the vapor inlet 41.

[0435] The vapors can be extracted from the receiving space 3 in particular by means of the ventilation device, in particular by means of the fan 15. The device 40 is arranged in particular in the negative pressure region of the ventilation device.

[0436] In the device 40, the vapors flow along a predetermined flow path from the vapor inlet 41 to the vapor outlet 42.

[0437] In doing so, the vapors flow along a flow path between the bottom tray 43 and the lid 44. In particular, they flow between the bottom tray 43 and the cooling plate 56.

[0438] During the operation of the device 40, the bottom tray 43 is filled to a predetermined filling level with cooling liquid, in particular in the form of cooling water. The cooling liquid forms a surface 76 that acts as a cooling member. The cooling liquid in the bottom tray 43 forms in particular a film or layer with cooling liquid.

[0439] In addition, cooling liquid, in particular in the form of fresh water, is added to the container via the fresh water inlet 65. Cooling water in particular can be applied to the cooling plate 56 through the fresh water inlet 65. The cooling plate 56 is cooled by this. In particular, it forms a component of a heat exchanger. The cooling liquid forms a further film or layer on the cooling plate 56. The vapors are thus guided between two layers of liquid in the device 40. Condensation of vapors occurs on the surface 76 of the cooling liquid in the bottom tray 43. Condensation of vapors also occurs on the underside of the cooling plate 56. Heat and moisture in particular are extracted from the vapors as they pass through the device 40. Excess cooling liquid can drip off the cooling plate 56 into the bottom tray 43.

[0440] The filling level of the bottom tray 43 with cooling liquid can be monitored by means of the filling level sensor 64. If a predefined filling level is exceeded, excess cooling liquid can be pumped out of the bottom tray 43 by means of the pump 63.

[0441] It may also be provided to add cooling liquid to or pump it out of the bottom tray 43 depending on the functional modes of the cooking appliance 1. Reference is made to PCT/EP2020/060 413 for the different functional modes of the cooking appliance 1. In particular, it may be provided to pump the cooling liquid out of the bottom tray 43 at least partially, in particular completely, for rapid extraction of vapors from the receiving space 3.

[0442] In particular, it may be provided to adjust the filling level of the cooling liquid in the bottom tray 43 in dependence on the functional mode of the cooking appliance 1, in particular depending on the volume flow that is generated by the fan 15. The setting of the filling level of the cooling liquid in the bottom tray 43 can be controlled by means of the filling level sensor 64.

[0443] The addition of the cooling liquid and/or its circulation in the bottom tray 43 can preferably be performed in a controlled manner. The addition of cooling liquid, in particular through the fresh water inlet 65, can in particular be performed in a clocked manner.

[0444] The device 40 for treating vapors can in particular have different operating modes, which differ with regard to the clocking of the addition of cooling liquid to the container. An exemplary overview of the different operating modes of the device 40 for treating vapors is summarized in the following table.

Overview of Operating Modes

[0445]

TABLE-US-00001 Operating behaviour of Clocking fresh Mode: Explanation: Destination Appliance: water: Pause (*) 0 switched off none 1 Standard mode for Maintain temper- e.g.: 1:10 to 1:3 high temperature ature at riser pipe 230 cooking at maxi- ranges (>170 C.) mum load of cooking space 2 Standard mode for Maintain temper- e.g.: 1:30 to 1:10 medium tempera- ature at riser pipe 130 gentle preparation ture ranges (e.g. 110 C. to 170 C.) 3 Cooling mode 1 if Lowering the tem- e.g.: 1:3 to 1:1 the initial tempera- perature at 230 cooking .fwdarw. build- ture in the riser pipe riser pipe up/overshoot with heating is too high control (too high ambient temperature) 4 Cooling mode 2 if Preventing damage e.g.: 1:1 the initial tempera- to the appliance 230 cooking with error ture in the riser pipe in appliance control is considerably too .fwdarw. overheating 300++ high 5 Minimum con- Reduce water con- e.g. 1:30 sumption mode sumption 80 steaming 6 Zero consumption Hardly any/no water e.g. Initial filling mode consumption 50 Steaming Refill every 30 min (*) exemplary values

[0446] The fresh water addition can be in the range of 100 ml/min to 10 l/min. In particular, it can be in the range of 1 l/min to 5 l/min.

[0447] The maximum water consumption with an uninterrupted addition of fresh water is in particular in the range of 50 l/h to 500 l/h, in particular in the range of 70 l/h to 200 l/h.

[0448] In the following, a method for cleaning the receiving space 3 and/or the device 40 for treating vapors is described by way of example and in key words.

[0449] For cleaning, a cleaning unit with a cleaning agent, in particular a plurality of cleaning agents, can be arranged in the receiving space 3. The cleaning unit can be designed as a cartridge. For details, reference is made to DE 10 2020 204 707.3, which is hereby fully integrated into the present application.

[0450] The cleaning method may comprise the following sequence of steps or at least a selection thereof: [0451] 1. circulating water from the container of the appliance 40 to the cooking space 3 for approx. 10 min, heating it to approx. 50 C. and circulating it while warm. This serves to loosen grease/contaminants. [0452] 2. pumping out waste water, filling the container of device 40 with fresh water. [0453] 3. circulating fresh water briefly via the cooking space 3. [0454] 4. pumping out waste water again, filling the container of device 40 with fresh water. [0455] 5. circulating the water from the container of the device 40 to the cooking space 3, thereby heating it to approx. 65 C. This serves to release the cleaner (lye) from the cartridge. [0456] 6. circulating water and cleaner (lye) at 65 C. for approx. 60 minutes. In the meantime, also circulating within the container of the device 40 internally for two to ten minutes. [0457] 7. pumping out the water/lye mixture, filling the container of device 40 with fresh water. [0458] 8. circulating fresh water three times via cooking space 3, pumping it out again and refilling the container of the device 40 with fresh water. This serves to rinse the lye completely out of the appliance 1. [0459] 9. circulating the water from the container of the device 40 to the cooking space 3, thereby heating it to approx. 95 C. This serves to release the decalcifier (citric acid) from the cartridge. [0460] 10. circulating water and decalcifier (citric acid) at 90 C. for approx. 20 minutes. In the meantime, also circulating within the container of the device 40 internally for two to ten minutes. [0461] 11. pumping out the water-decalcifier mixture, filling the container of the device 40 with fresh water. [0462] 12. circulating fresh water three times via cooking space 3, pumping it out again and refill the container of device 40 with fresh water. This serves to flush the acid completely out of the appliance 1.

[0463] Cleaner and decalcifier can be introduced into the receiving space 3 via a cartridge. The cartridge can contain cleaner and/or decalcifier. In particular, lye, in particular caustic soda, serves as the cleaner.

[0464] Acid, in particular citric acid, serves as a decalcifier. Other acids are also possible.

[0465] For further details of the cartridge, reference is made once again to DE 10 2020 204 707.3.

[0466] Further possible uses of the device 40 for treating vapors are illustrated below with reference to FIGS. 16 and 17.

[0467] The device 40 for treating vapors can also serve to improve an apparatus 80 for extracting cooking fumes. In this case, it is adapted in particular to the usually significantly higher extraction capacity of such an extractor fan apparatus. In particular, it can be dimensioned larger to take account of the larger maximum volume flow.

[0468] The apparatus 80 for extracting cooking fumes can be designed as an extractor fan. In particular, it may be designed as an apparatus for extracting cooking fumes downwards. Such apparatuses 80 are also referred to as trough fans or downdraft systems or, in particular if they are integrated into a hob, as hob extractors. The apparatus 80 can in particular be part of a hob system 81 comprising one or a plurality of hobs 82.

[0469] In particular, it is possible to design the hob system 81 as an assembly unit. In particular, it is possible to integrate all components of the hob system 81 into a single appliance. A corresponding design of the hob system 81 is also referred to as a compact appliance. Corresponding appliances are known, for example, from EP 2 975 327 B1, the description of which is hereby referred to.

[0470] The hob system 81 has a cooking product carrier 83, in particular in the form of a glass ceramic plate. The cooking product carrier 83 can be configured to be simply continuous. In particular, it can have an inlet opening 84 for vapors, in particular in the form of cooking fumes.

[0471] The hob system 81 has electronic components, in particular in the form of hob electronics 85. This is only shown very schematically in the Figs. The hob electronics 85 are arranged underneath the cooking product carrier 83.

[0472] In addition, the hob system 81 comprises one, two or more fans 86. The device 40 for treating vapors may be located in the flow region between the cooking fume inlet opening 84 and the fan 86. It is also possible to arrange the device 40 downstream from the fan 86.

[0473] Preferably, the device 40 is arranged underneath the hob electronics 85. This reduces the risk of damage to the hob electronics 85 by cooling water from the device 40. Preferably, all cooling water-carrying members of the device are arranged underneath, in particular completely underneath, the hob electronics 85 and/or underneath electrical or electronic components of a control device of the hob system 81.

[0474] The device 40 for treating vapors may in particular form a cooking fume suction chamber or replace such a cooking fume suction chamber.

[0475] A filter 87, in particular a grease filter, can be provided in the flow region between the cooking fume inlet opening 84 and the vapor inlet 41.

[0476] The hob system 81 may have one or a plurality of additional filters, in particular odor filters, in particular activated carbon filters, UV filters or plasma filters.

[0477] The hob system 81 may in particular have one or a plurality of filters downstream from the fan 86. In particular, it may have an odor filter, in particular in the form of an activated carbon filter, downstream from the fan 86.

[0478] As shown schematically in FIG. 17, the device 40 for treating vapors and/or the fan 86 may be arranged in a base region 88 of a kitchen cabinet 89. They can also be arranged on a kitchen cabinet. In particular, they can be designed as separate modules which can be positioned essentially freely.

[0479] The device 40 for treating vapors can be integrated, in particular retrofitted, into existing appliances, in particular extractor fans comprising at least one cooking fume suction chamber. The device 40 for treating vapors can be integrated into a cooking fume suction chamber or replace the latter. The dimensions of the device 40 for treating vapors and in particular the arrangement and/or design of the vapor inlet 41 and the vapor outlet 42 can be adapted to the corresponding details of the cooking fume suction chamber.

[0480] With the help of the device 40 for treating vapors, the humidity of the vapors in particular can be considerably reduced. This can reliably prevent a build-up of moisture in the region of kitchen furniture, in particular in regions that are difficult to access, for example behind kitchen furniture. With the help of the device 40 for treating vapors, it can be prevented in particular that condensation of moisture from the vapors occurs on masonry walls and/or furniture.

[0481] In the following, further details and advantages of the invention are described again in keywords, independently of the specific embodiment examples.

[0482] Preferably, the inner side of the container, in particular the inner side of the bottom tray 43 and/or the lid 44 and/or the surface of the cooling plate 56 may have a dirt-repellent coating and/or an antibacterial coating.

[0483] A metering member can be provided for adding the fresh water to the container of the device 40. The metering member is in particular designed in such a manner that it enables a clocked metering of the fresh water addition.

[0484] When the cooling water drains from the cooling plate 56, a water curtain can form. The cooling water can also flow through a plurality of separate openings in the cooling plate 56 into the bottom tray 43. This can increase the surface area of the cooling water that is available to react with the vapor flow (so-called rain shower effect).

[0485] The cooling water draining from the cooling plate 56 can also serve for heat transfer and condensation of the vapor flow.

[0486] The cooling plate 56 can be provided with a rolled-in and/or embossed surface structuring. It can also have, at least in some regions, a polished surface, in particular in the region of its underside. This can improve the cooling effect and/or the condensation of the vapors on the cooling plate 56.

[0487] Cooling fins or other members for dissipating heat may be arranged at the cooling plate 56. In principle, such members can extend through the lid 44 to the outside of the container of the device 40. In particular, the cooling plate 56 can be designed in such a manner that it can be cooled from outside the container. In particular, it can be coupled in a heat-transferring manner to a heat exchanger which is arranged outside the container of the device 40.

[0488] The device 40 is designed in such a manner that it enables both continuous vapor separation and short-term evacuation of the receiving space 3. It is preferably designed in such a manner that flow losses are kept as low as possible.

[0489] Depending on the operating mode, the addition of fresh water and/or the pumping out of waste water can be switched according to a defined process scheme. This allows the heat capacity of the fresh water to be utilized particularly well. This can reduce water consumption.

[0490] The circulation flow in the bottom tray 43 and the direction of flow of the vapors that are extracted from the receiving space 3 can be opposite, at least in portions. The circulation flow can in particular form a counterflow heat exchanger.

[0491] In particular, the circulation flow may have a component in a region in the bottom tray 43 that is adjacent to the vapor outlet 42 which component is opposite to a component of the vapor flow in this region, in particular a direction given by a connecting line from the vapor inlet 41 to the vapor outlet 42.

[0492] In particular, the device 40 may have a connection to the fresh water and/or waste water network. Inside the cooking appliance 1 instead of a mains water connection, the device 40 can also have a reservoir for fresh water and a reservoir for waste water. The fresh water reservoir and the waste water reservoir are preferably removable without tools and manually from the housing 2 of the cooking appliance 1. In particular, they can be filled and emptied manually.

[0493] The filling level sensor 64 may comprise a float gauge, an electrical conductance meter, a distance meter, in particular an ultrasonic distance meter or a laser distance meter or another sensor.

[0494] The container of the device 40, in particular the bottom tray 43, in particular all components of the container as well as all components arranged in the container, have a media resistance to acid, in particular to citric acid, and/or carbonic acid (sodium carbonate dissolved in water). Preferably, they also have a media resistance to lye, in particular caustic soda.

[0495] Preferably, the free surface of the cooling water in the bottom tray 43 is as large as possible in relation to the bottom region of the bottom tray 43. The ratio of the free surface of the cooling water in the bottom tray 43 to the bottom region of the bottom tray 43 is in particular at least 0.5, in particular at least 0.7, in particular at least 0.9, in particular at least 0.95.

[0496] A large surface area of the cooling water ensures that as much reaction surface as possible is available for cooling and/or condensation of the vapor flow.

[0497] For particularly efficient cooling of the vapor flow, one or a plurality of means may be provided to increase the free surface of the cooling water in the container. These means may comprise a selection of trickling means, nebulization means and swirling means. Such means may be provided in particular for the addition of fresh water to the device 40. In this case, clogging of the corresponding means due to impurities is not to be expected.

[0498] A pressure-generating means can be provided for trickling and/or nebulizing the cooling water.

[0499] To improve the cooling of the vapor flow, multi-stage cooling can be provided, in particular with pre-cooling and post-cooling. This can further reduce water consumption.

[0500] It has proven advantageous to keep the volume of the cooling water in the bottom tray 43 as small as possible. The cooling water or other liquids in the bottom tray 43 can thus be pumped out and/or replaced very quickly.

[0501] Wave breaker members can be provided to reduce, in particular to prevent wave formation in the bottom tray 43. These wave breaker members are preferably located crosswise to the direction of flow of the vapor flow.

[0502] Retaining elements, in particular in the form of sieves, can be provided to protect the pumps 60, 63.