EP4337892B1 - Verfahren zum kühlen des austretenden wrasens oder dampfs aus dem garraum eines gargeräts und gargerät - Google Patents

Verfahren zum kühlen des austretenden wrasens oder dampfs aus dem garraum eines gargeräts und gargerät Download PDF

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Publication number
EP4337892B1
EP4337892B1 EP22725432.3A EP22725432A EP4337892B1 EP 4337892 B1 EP4337892 B1 EP 4337892B1 EP 22725432 A EP22725432 A EP 22725432A EP 4337892 B1 EP4337892 B1 EP 4337892B1
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EP
European Patent Office
Prior art keywords
opening
cooking
door
cooking chamber
control device
Prior art date
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Active
Application number
EP22725432.3A
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German (de)
English (en)
French (fr)
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EP4337892A1 (de
EP4337892C0 (de
Inventor
Anna Günter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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Publication of EP4337892A1 publication Critical patent/EP4337892A1/de
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Publication of EP4337892C0 publication Critical patent/EP4337892C0/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • F24C15/327—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation with air moisturising
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/006—Arrangements for circulation of cooling air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/085—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on baking ovens

Definitions

  • the invention relates to a method for cooling the vapors or steam escaping from the cooking chamber of a cooking appliance, in particular an oven or steam cooker, wherein the cooking appliance is equipped with a cooking chamber, a door for closing a front loading opening of the cooking chamber, a cooling device for replacing part of the vapors or steam in the cooking chamber with cold air, and a control device for actuating the cooling device in response to a control command.
  • the invention also relates to a cooking appliance for carrying out such a method.
  • cooking appliances heat food, hot vapors are created. These vapors are formed from the moisture present in the food at the beginning, which is then released into the outside environment as cooking progresses.
  • cooking appliances in which steam is introduced into the cooking chamber to heat it or support the cooking process.
  • Such cooking appliances are primarily ovens or steam cookers, but there are also combination appliances that combine steam, radiant heat, and dielectric heating via microwaves. If the door of one of the aforementioned appliances is opened manually by an operator during the cooking process, the vapors or steam present in the cooking chamber can suddenly escape from the loading opening, which has been at least partially exposed, and can startle the operator or cause problems such as fogging up glasses.
  • steam will be used in the following description, even though vapors could be intended.
  • EP 2 180 259 A1 It is known to provide a deflection device in an oven with a cooling air outlet above the cooking chamber door, which, when the door is opened, pivots into the air flow into the cooling air outlet, thereby deflecting the air parallel to the loading opening and thus forming an air curtain that prevents steam from escaping from the opening. Similar devices are known from US 2017 0 082 296 A1 and from the EP 3 450 857 A2 known.
  • the DE 10 2018 104 297 A1 describes a household appliance in which an infrared transmitter and an infrared detector form a proximity sensor that is capable of detecting a person approaching the appliance.
  • a generic cooking appliance is known from the publication EP 3 647 664 A1 .
  • KR20190001887A also discloses a similar prior art cooking appliance.
  • the invention therefore addresses the problem of disclosing a method of the type mentioned above and a cooking appliance for carrying out such a method, in which the escape of steam from the loading opening is further reduced when the door is opened. According to the invention, this problem is solved by a method having the features of patent claim 1 and by a cooking appliance having the features of claim 12.
  • the advantages of the invention are achieved in a method for cooling the escaping steam from the cooking chamber of a cooking appliance, in particular an oven or steam cooker, wherein the cooking appliance is equipped with a cooking chamber, a door for closing a front loading opening of the cooking chamber, a cooling device for replacing part of the steam in the cooking chamber with cold air, and a control device for actuating the cooling device by a control command, in that the control command is triggered by the signal or measured value of a proximity sensor arranged on the cooking appliance, wherein the signal or measured value is generated by the proximity sensor as a result of a person approaching the cooking appliance.
  • Cooling the escaping steam within the meaning of the invention, means replacing part of the cooking chamber atmosphere with cold air before or at the latest when the door is opened.
  • the loading opening is the area formed by the front edges of the cooking chamber and is free of a cooking chamber wall.
  • the proximity sensor or the control device can be suitable and designed to distinguish an approaching person from a moving object or an approaching animal. It is even known from the prior art to identify certain people as operators through suitable image capture and analysis, for example, through gesture recognition, and to distinguish them from others who happen to be in the area where the appliance is installed. If such an identification device is not present on the appliance in question, the control device initially assumes that each person approaches is an operator and triggers the control command to activate the cooling device.
  • the amount of steam drawn out of the cooking chamber through the first opening is significantly increased.
  • the resulting negative pressure ensures that cold air is drawn in through other openings, initially through existing openings or leaks in the cooking chamber, and then further amplified by the door being manually opened by an operator.
  • the cooking chamber atmosphere is consequently cooled, and the resulting suction effect also reduces the escape of steam from the door gap created and enlarged by the opening.
  • This increase is advantageously achieved by increasing the fan speed via the control device.
  • a second cooling fan can be used, which the control device then switches on when a person approaches.
  • Increasing the exhaust air flow also facilitates the use of a deflection device known from the prior art, for example a pivotable strip arranged in the area of the exhaust/suction opening, which in a first position releases the exhaust air flow from the exhaust/suction opening at least approximately in the direction of the flow line and in a second position deflects the exhaust air flow towards the loading opening.
  • a deflection device known from the prior art, for example a pivotable strip arranged in the area of the exhaust/suction opening, which in a first position releases the exhaust air flow from the exhaust/suction opening at least approximately in the direction of the flow line and in a second position deflects the exhaust air flow towards the loading opening.
  • the strip projects with at least one part into the pivoting range of at least part of the door, so that the strip is in the first position when the door is closed and in the second position when the door is open. This creates the air curtain automatically by
  • a air flow duct is provided that extends at least from the cooling fan or the other fan to an exhaust and/or intake opening in the front of the cooking appliance above the cooking chamber.
  • the intake air flow can advantageously be generated by the control device reversing the direction of rotation of the cooling fan. In this case, no additional fan needs to be used. Alternatively, the use of an additional fan is of course possible. In particular, this additional fan can also be used to extract cooking fumes that arise in the area of a cooktop that is arranged above the cooking chamber, i.e. in the upper area of the cooking appliance.
  • the first flap unit can, for example, be arranged as shown in the DE 10 2016 121 834 A1
  • a A flow line is arranged that extends to an exhaust and/or intake opening in the front of the cooking appliance above the cooking chamber, and the opening in the ceiling provides a fluid connection between the cooking chamber and the flow line. Either in the flow line or in a cooling fan (see A.), the steam escaping from the cooking chamber can then be mixed with cold air, preventing it from escaping uncooled from elsewhere in the appliance.
  • heating chamber wall refers to a wall of the cooking chamber that is not the ceiling, i.e., the wall located on top during operation.
  • the cooking chamber wall can be the floor, one of the side walls, and preferably the rear wall of the cooking chamber.
  • Both flap units can advantageously be moved, i.e., opened and/or closed, by actuators operated by the control device. It is particularly advantageous if the control unit and the second flap device are configured to open the second opening within a period of less than 5 seconds, in particular less than 3 seconds, and in particular a maximum of only 1 second. This enables rapid cooling. It is particularly advantageous if, when the second opening is opened via the control device, the latter switches on a recirculation fan to circulate the air or steam in the cooking chamber. This improves the mixing of the cooking chamber atmosphere with cold air.
  • a very simple way of cooling the steam in the cooking chamber before an operator opens the door is to have the door slightly opened before the operator actually opens it. This allows some of the hot steam to escape before the door is fully opened and to be replaced by cold air.
  • the opening of the door is effected by an automatic opening device which is activated by the control device when a person approaches.
  • the control device closes the door completely again by means of an automatic closing device if the door opening sensor does not detect any movement exceeding a certain value within a predetermined period of time after the control command has been triggered by the signal or the measured value of the proximity sensor.
  • the opening of the door beyond the gap is sensed.
  • the opening and closing devices can advantageously be integrated into a common mechanism, but they can also be designed as separate components. The previously described reaction of the control device and the closing device ensures that the slightly open door is automatically closed again if a person approaches the cooking appliance only accidentally or without the intention of opening it. This prevents the cooking program from continuing with the door slightly open.
  • the cooling device is only activated in response to a control command from the control device in a cooking program if an operator has previously given permission when switching on the cooking program or during its course via a control device of the cooking appliance.
  • the operator can select that the cooling device is only activated in programs in which a door is intended to be opened during the program run.
  • the proximity sensor is switched on by the operator's permission. In programs in which the proximity sensor is also used for other purposes, non-release can be implemented by suppressing the triggering of the control command to activate the cooling device.
  • control device deactivates the cooling device if a door opening sensor does not detect any opening of the door beyond a gap within a predetermined period of time after the control command has been triggered by the signal or the measured value of the proximity sensor.
  • a cooking appliance for carrying out one of the above-described embodiments of a method according to the invention in particular an oven or a steam cooker, is equipped with a cooking chamber, with a door for closing a front loading opening of the cooking chamber, with a cooling device for replacing part of the steam in the cooking chamber with cold air, with a control device for actuating the cooling device in response to a control command, and with a proximity sensor for generating a signal or a measured value as a result of a person approaching the cooking appliance.
  • the control device of the cooking appliance is suitable and configured to execute the control command for carrying out one of the above-described embodiments of the method. Further advantageous embodiments of the cooking appliance are also described above in connection with the embodiments of the method.
  • FIG. 1 shows a perspective view of a cooking appliance 10 according to the invention in the form of a built-in oven 11.
  • This has a cooking chamber 30 (not visible in this figure) with a front loading opening 36 (also not visible here) (see for example the Figures 2a , b ).
  • the loading opening 36 is closed by a door 40.
  • a control panel 70 can be seen, in which display devices 71, here a display 710, and control devices 72, here a push button 720, are arranged.
  • display devices 71 here a display 710
  • control devices 72 here a push button 720
  • the display and control devices 71 and 72 can also be combined to form a touch display, unlike shown in the figure.
  • a slit-shaped exhaust and/or intake opening 83 Between the upper edge of the door 40 and the lower edge of the control panel 70 extends a slit-shaped exhaust and/or intake opening 83, the function of which will be explained later.
  • a proximity sensor 73 can be seen, which in the embodiment shown here is arranged below the display 710.
  • the sensor 73 can also be installed at another location on the device 10, but an arrangement in the control panel 70 is advantageous.
  • the function of the sensor 73 will also be explained later.
  • the Figure 1 parts of a door lock 44 can be seen.
  • FIGS 2a to c show schematic sketches illustrating the inventive functions of the built-in oven 11 from Figure 1 be explained in detail.
  • the oven 11 has a housing 13, which, as already described in connection with Figure 1 explains a cooking chamber 30 which is open at the front.
  • the cooking chamber is delimited by walls, namely a ceiling 31, a floor 32, a rear wall 33 and two side walls 34 and 35.
  • a top heat element 371 and a ring heater 372 are arranged for heating, and a bottom heat element 376 is also provided under the base 32.
  • the heat from the ring heater 372 can be better distributed in the cooking chamber 30 via a circulating air fan 373 and, if necessary, via a shielding plate 374 with openings 375.
  • Additional heating devices 37 such as a microwave heater or a steam generator, are not shown in the drawings, but can be provided in addition to the pure radiant heaters 371, 372, and 376.
  • a cooking appliance 10 according to the invention can, however, also be operated as a microwave oven or as a steam cooker other than in the oven function described above.
  • additional radiant heaters 371, 372 and 376 can also be used, however, the use of the individual heating devices 37 (top heat, bottom heat, circulating air heating, microwave, steam) in the programs of these appliances 10 will be different than in the described built-in oven 11.
  • the loading opening 36 which is formed by the open side of the cooking chamber 30, can be closed by a door 40.
  • FIGS. 2a to c show a device 10 in which the door 40 is designed to be pivotable about a horizontal axis in the region of the lower edge 401.
  • a door lock 44 To hold the door 40 in the closed state, and if necessary also to lock the door 40 in a state in which opening it is dangerous for an operator and therefore not permitted (for example, when carrying out a pyrolysis cleaning program), corresponding parts of a door lock 44 are provided in the upper region 402 of the door 40 and in the adjacent region of the housing 13.
  • the door lock 44 is provided with an integrated automatic opening device 41 which causes the door 40 to open automatically, i.e., not by an operator, by a gap.
  • a gap is understood to mean an opening of a few angular degrees relative to the fully closed state (hereinafter referred to as closed), so that the shortest measured distance between the upper door edge 403 and the housing 13 is between one and five centimeters.
  • This state of the door 40 is referred to below as being slightly open. Any opening of the door 40 beyond this is referred to as being open.
  • the automatic opening device 41 can also be located at a different location on the housing 13 and/or the door 40, i.e., not integrated in the door lock 44.
  • an automatic closing device 42 is also provided, with which the slightly open door can be closed again such that the gap is at least approximately zero centimeters.
  • such a closing device 42 is realized by a spring arrangement, for example, in the area of the door hinges (not shown).
  • the automatic opening device 41 can, especially if it is not integrated into the door lock, be designed as a motor-driven or otherwise electrically actuated slider (also not shown).
  • the box 43 represents the variant in which the door lock 44 and the automatic opening and closing device 41 and 42 are integrated into one assembly.
  • a possible structure and function of such a door lock are described, for example, in European patent applications EP 3 324 124 A1 and EP 3 324 125 A1 and therefore not described in detail here.
  • a door opening sensor 45 is also integrated into such a door lock 44.
  • the door opening sensor 45 detects at least the three states “door closed,””door slightly open,” and “door open” and is capable of transmitting distinguishable signals or measured values to a control device 60, by means of which the control device can detect and respond to the various opening states through appropriate programming.
  • a first opening 311 is arranged in the ceiling 31.
  • an adjustable first flap unit 312 is arranged, with which the opening cross-section can be changed.
  • the first flap unit 312 is shown pivotable here.
  • the flap unit 312 and its adjusting device (actuator in the form of an electric motor, not shown) will have a structure as shown in the DE 10 2016 121 834 A1 is known and in the Figures 3a to c is shown schematically. This means that a flap 313 with an integrated smaller flap opening 314 will be arranged above the larger first opening 311 and can be displaced in a plane parallel to the plane of the opening 311.
  • a space 80 for electrical and electronic components is separated by a metal sheet 81, which is also surrounded by the housing 13.
  • This space 80 is bounded at the front by the control panel 70, and at the top, sides, and rear by the walls of the housing 13.
  • the control device 60 is arranged, which is preferably designed as a microprocessor controller. This control device 60 receives measured values and input data, among others from the proximity sensor 73 and the control device 72, but also from the door opening sensor 45. It controls, via control commands, among other things, the first flap unit 312 and the automatic opening and closing devices 41 and 42.
  • the individual heating devices 37 are also switched on and off by the control device 60, either directly or via an interposed power unit (not shown).
  • the dashed arrows 61 to the control device 60 symbolize the data lines via which the measured values and signals are transmitted, and the dashed arrows 62 to the components symbolize lines via which the control commands are issued by the control device 60.
  • the measured values and signals themselves are designated by the reference numeral 61 and the control commands by the reference numeral 62.
  • a cooling fan 85 is also arranged in the space 80 to cool the electrical and electronic components. This cooling fan can be switched on and off and its speed can be controlled or regulated by the control device 60. In a special embodiment, the cooling fan 85 can be rotated in both directions and the direction of rotation can be set by the control device 60.
  • the cooling fan 85 draws in cold air from the surroundings of the cooking appliance 10 through upper openings 132 in the housing 13 and transports this air as an exhaust air stream into the space 80 for electrical and electronic components.
  • the cold air is symbolized by white arrows 21.
  • a large portion of the exhaust air stream is then directed through openings 810 in the sheet metal 81 into a flow line 82 formed by a gap between the sheet metal 81 and the ceiling 31 of the cooking chamber 30. There, the air stream sweeps over the outer side 310 of the cooking chamber ceiling 31 and there over the first opening 311 or the first flap unit 312.
  • the air stream entrains hot steam (symbolized by the black arrows 20) rising from the small or enlarged first opening 311 from the cooking chamber and mixes with it.
  • the resulting warm air (symbolized by the gray arrows 22) then exits the slot-shaped opening 83, which consequently functions as an exhaust opening.
  • the cooling fan 85 and associated air paths are designed such that the steam 20 is drawn from the first opening 311 into the cooling fan 85, where it is mixed with cold air 21 that is also drawn in from the appliance's surroundings.
  • the proximity sensor 73 itself can be constructed in such a way that it only generates a signal 61 when this predetermined distance 64 is undershot. However, it can also continuously supply measured values 61 to the control device 60, the value of which varies with the distance 64 of persons 63 in the area of the appliance 10, and the control device 60 then triggers the control command 62 to activate the cooling device 65 if the value of the measured value 61 exceeds a predetermined threshold.
  • the cooling function is not implemented permanently during each operation of the cooking appliance 10, i.e., in each cooking program (there are programs in which the proportion of hot steam in the cooking chamber 30 is so low that it does not cause any disturbance when the door 40 is opened; there are also situations in which persons 63 frequently approach the cooking appliance 10 during the execution of a cooking program and it is therefore not desired that the cooling device 65 is activated each time; moreover, there are programs such as a pyrolysis cleaning program in which the door 40 cannot be opened at all), but rather when an operator 63 must enable the cooling function via the operating device 72, in particular when setting the program.
  • This release can be achieved by switching on the proximity sensor 73 only in cooking programs for which the release has been given.
  • the signals or measured values 61 of the proximity sensor 73 can be evaluated by the control device 60 only in those programs for which the release has been given. Release can also be blocked by the control device 60, for example, when a pyrolysis cleaning program is being carried out.
  • the following description assumes, whenever the term program or cooking program is used, that release has been given for this.
  • a release option is only an advantageous embodiment of the invention and does not have to be mandatory. It is also advantageous if the control device 60 recognizes that a person 63 to whom the proximity sensor 73 has responded does not actually represent an operator 63 in the sense that they also open the door 40.
  • the previously described door opening sensor 45 is provided, which detects the three states “door closed,””door slightly open,” and “door open” and is capable of transmitting distinguishable signals or measured values 61 to the control device 60, by means of which the control device 60 can detect and react to the various opening states.
  • the control device 60 After detecting the approach of a person 63 via the signal or measured value 61 of the proximity sensor 73, the control device 60 counts down a predetermined period of time. If the signal or measured value 61, which correlates with the open state of the door 40, is absent within this period, the control device 60 deactivates the cooling device 65 and the cooking program continues.
  • the control device 60 first switches on the cooling fan 85 and puts it into operation if this was not already the case in the current program.
  • the cooling fan 85 is then running, or if it was already running previously in the program, its speed is increased by the control device 60 compared to the speed of conventional programs. This is easiest to achieve when there are several different speed levels (for example, a high, a medium, and a low) and when the cooling fan 85 is operated at a low or medium speed level or even not at all in a cooking program and when it is switched to the high speed level for the cooling function.
  • the cooling fan 85 and the control device 60 can also be designed to implement stepless speed changes and then, for example, to carry out a percentage speed increase or an increase in the speed by a predetermined speed difference for the cooling function.
  • the increase in speed increases the blow-out air flow and thus increases the mixing of the hot steam 20 exiting the first opening 311 with cold air 21.
  • more hot steam 20 is taken from the cooking chamber, mixed with cold air 21, and blown out of the opening 83 as warm air 22, which in this case functions as a blow-out opening. See Figure 2a .
  • the operator 63 then opens the door 40, the steam 20 in the cooking chamber 30 has already been partially replaced by cold air 21 and has therefore been cooled down, so that the temperature and thus also the quantity of steam 20 escaping from the open loading opening is reduced.
  • the first flap unit 312 is set by the control device 60 into the second state, in which the flap 313 is pushed to the side and completely exposes the first opening 311 in the ceiling 31.
  • Hot steam 20 will then increasingly emerge from the first opening 311 and escape from the cooking chamber 30 via the flow line 82 and the exhaust opening 83, see also Figure 2a .
  • the enlargement of the first opening 311 is combined with an increase in the exhaust air flow of the cooling fan 85 (1.1). This, on the one hand, extracts even more steam 20 from the cooking chamber, and on the other hand, the steam 20 flowing out of the exhaust opening 83 is first mixed with cold air 21 and cooled.
  • a reversal of the direction of rotation of the cooling fan 85 (meaning the rotor not shown here and thus the fan blades of the cooling fan 85, also not shown) when a person 63 approaches in a second direction of rotation by the control device 60 converts the exhaust air flow into an intake air flow.
  • the resulting air flow is in Figure 2c shown with a cooking appliance 10 with a partially open door 40.
  • Cold air 21 from the environment in front of the cooking appliance 10 is conveyed through the opening 83, which now functions as an intake opening, into the flow line 82. In this way, the cold air 21 mixes with the hot steam 20, which exits from the door 40 opened by the operator 63 and is also sucked in, even before the cooking appliance 10.
  • the warm air resulting from the mixture is conveyed through the flow line 82 and the openings 810 in the sheet 81 to the cooling air fan 85 and from there blown outside.
  • the steam 20 is not only cooled but also deflected away from the operator 63, so that the door 40 can be opened safely.
  • This variant can also be combined with one or more other measures, in particular with the enlargement of the first opening 311 described under 1.2 - then a part of the hot steam 20 is also sucked out of the cooking chamber 30 through this and cooled there - and/or particularly advantageously with the gap-wise opening of the door 40 described under 1.3 - as a result, a part of the steam 20 is sucked out of the cooking chamber via the gap-open door and replaced by colder air 21 even before the operator 63 arrives at the device 10.
  • FIGs 5a and b show a further embodiment of a cooking appliance 10, which is modified in the area of the exhaust/intake opening 83.
  • a strip 84 is pivotably mounted at the front end of the flow line 82, preferably on the sheet 81, the underside of which defines the upper limit of the flow line 82.
  • the pivot axis 841 of the strip 84 extends parallel to the longitudinal extent of the exhaust/intake opening. 83 at least approximately over the entire width of the cooking appliance 10.
  • Recesses in the area of the door lock 44 can be provided if necessary (not shown in the figure).
  • the mounting of the bar 84 is designed such that it can be moved into the position shown in FIG. 10 solely by gravity.
  • Figure 5b shown position (deflection position 843).
  • At least one driver 46 is arranged on the upper edge 403 of the door 40, which is dimensioned in terms of its longitudinal extent 461 such that it engages so far into the pivoting range of the bar 84 that it presses the bar 84 into an at least approximately horizontal position (inactive position 842) when the door 40 is closed, see Figure 5a .
  • the driver 46 should only cover a few millimeters in its transverse extent (not shown, points in the plane of the drawing) so that it only blocks the exhaust/suction opening 83 to a small extent when the door 40 is closed.
  • FIGS. 5a and 5b clearly show the functionality of the design by illustrating the flow conditions.
  • Figure 5a When the door 40 is closed, the bar 84 is pivoted backwards into its horizontal, inactive position 842 by the driver 46. In this position, the cooling fan 85 (see Figures 2a to c ) generated blow-out air flow can escape essentially unhindered past the one or more drivers 46 through the flow line 82 from the blow-out opening 83.
  • the strip falls into its vertical deflection position 843 and deflects the exhaust air flow downwards after exiting the exhaust opening 83. This creates an air curtain that prevents the hot steam 20 from escaping (see Figures 2a to c ) from the cooking chamber 30.
  • the Figures 6a to c show a further embodiment of a cooking appliance 10 according to the invention with a cooling device 65.
  • the cooling device 65 here is a second opening 330 which, as in the Figure 6a recognizable preferably arranged in the rear wall 33 of the device 10, in combination with a second flap unit 331, which is in the Figures 6b and 6c shown in two different views.
  • the flap unit 331 has a closure plate 332, which can be moved by a pivoting arm 333 by means of an actuator in the form of an electromagnet 334 into two different positions, namely a closed position (in the Figures 6b and 6c shown) and an open position (in the Figure 6a (shown schematically).
  • the electromagnet 334 is switched by the control device 60 and, as already described above in connection with the other cooling devices 65, is always actuated when the control device 60 detects the approach of a person 63 via the proximity sensor 73.
  • the use of an electromagnet 334 enables very rapid actuation of the pivot arm 333 and the closure plate 332 within a period of less than one second.
  • the proximity sensor 73 sends a signal 61 to the control device 60. This then sends a control command 62 to the electromagnet 334 and the electromagnet moves the locking plate 332 via the pivot arm 333 into the Figure 6a shown open position.
  • Cold air 21 then flows through the second opening 330 into the cooking chamber 30 and mixes with the hot steam 20, cooling it down.
  • the control device 60 also switches on the circulating air fan 373, if this was not already in operation during the current program, in order to intensify the mixing of the cold air 21 and the hot steam 20.
  • the flap 313 of the first flap unit 312 is also pushed to the side (see 1.2) and the first opening 311 in the ceiling 31 is completely opened, so that the mixture of cold air 21 and hot steam 20 (warm air 22) can flow out of the cooking chamber 30 even better via the flow line 82 and the exhaust opening 83, and more cold air 21 is sucked in through the second opening 330.
  • the exhaust airflow of the cooling fan 85 can then be increased (see 1.1), further enhancing the previously described effect. Opening the door 40 a little at a time (see 1.3) can also be advantageous.
  • the cooling device 65 is deactivated again when the control device 60 recognizes that the approaching person 63 is not an operator 63 at all.
  • FIGs 7a and 7b show two different embodiments of cooking appliances 10, in which a further fan 121 is provided as a cooling device 65, which fan at least partially sucks the hot steam 20 out of the cooking chamber 30 and replaces it with cold air 21.
  • Figure 7a shows the first embodiment of the cooking appliance 10 using the example of a built-in oven 11.
  • the fan 121 is integrated into the rear, lower part of the appliance 11 in the space between the cooking chamber rear wall 33 and the housing rear wall 131.
  • the suction area 122 is directed into a flow line 821, which in this appliance extends not only from the blow-out/suction opening 83 into the space between the sheet metal 81 and the ceiling 31 of the cooking chamber 30, but also on the rear of the appliance into the space between the cooking chamber rear wall 33 and the housing rear wall 131.
  • the blow-out area 123 of the fan 121 is directed towards a lower opening 133 in the housing rear wall 131.
  • the additional fan 121 can also be arranged outside the built-in oven 11, for example, in a base of a kitchen unit (not shown).
  • the flow line 821 must be extended by an intake hose or an intake pipe (not shown) between the lower opening 133 in the housing rear wall 131 and the intake area 122 of the fan 121.
  • the fan 121 is switched on/off by the control device 60 and, if necessary, its speed is also controlled.
  • a cooking hob 12 is also provided, which is equipped with a device 120 for extracting cooking vapors.
  • the additional fan 121 is then also a component of this device 120 and can extract cooking vapors that arise in the area of the cooking hob 12 when boiling water and cooking food via a further flow line 124, which is led from an opening (not shown) in the area of the cooking hob 12 to the intake area 122 of the fan 121.
  • the fan 121 shown in the previous embodiment ( Figure 7a ) described flow line 821 from the exhaust/suction opening 83 to the suction area 122 of the further fan 121 is present.
  • the system 13 comprising hob 12 and cooking appliance 10 with cooking chamber 30 can, as in the Figure 7b shown, be designed as a combined unit, for example as a stove or as a built-in oven, built-in steam cooker or built-in microwave oven with a cooking surface arranged directly above it. Then it can be advantageous if the two flow lines 124 and 821 have a common part 125, which is arranged in particular in the cooking appliance 10 with cooking chamber 30.
  • a switching device 126 actuated by the control device 60 can preferably be arranged, via which switching device 126 one or the other separate part of the flow lines 124 or 821 can be selectively blocked.
  • the hob 12 can also be arranged separately from the cooking appliance 10 with the cooking chamber 30, i.e., not directly above it. Then, the flow lines 124, 821, and 125 will be at least partially connected to the additional fan 121 via hose/pipe connections. The fan 121 itself can then be installed, for example, in a kitchen base. The switching device 126 will then either be assigned to the additional fan 121 (either integrated or pre-installed), or a part of the switching device 126 will be arranged in both the hob 12 and the cooking appliance 10, which can open or close the respective flow line 124 or 821.
  • both appliance parts 10 and 12 can have their own control devices 60. In this case, however, it must be ensured that these control devices 60 can exchange data to implement the cooling function of a cooling device 65 according to the invention, or that the control device 60 of the cooking appliance 10 can control the components necessary for implementing such a cooling function.
  • the additional fan 121 is installed separately from at least one of the appliances, hob 12 and cooking appliance 10, there will be data lines or wireless data transmission between the control device(s) 60 and the fan 121.
  • the proximity sensor 73 sends a signal 61 (not shown) to the control device 60, which is responsible for implementing the cooling function of the cooling device 65 according to the invention. This then sends a control command 62 (not shown) to the additional fan 121 and switches it on (possibly at a preset speed). If it was not already switched on during use of the hob 12 to extract cooking fumes, in which case only the speed needs to be adjusted if necessary. A further control command 62 (not shown) is sent to the switching device 126.
  • the opening 311 is controlled by a first flap unit 312 can be closed, it is advantageous for the control device 60 to set the flap unit 312 into the second state, in which the flap is pushed to the side and completely exposes the first opening 311 in the ceiling 31, see 1.2.
  • a combination with the gap-wise opening of the door 40 described under 1.3 is particularly advantageous - as a result, even before the operator 63 arrives at the device 10, part of the steam 20 is sucked out of the cooking chamber 30 via the gap-open door 40 and replaced by colder air 21.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Ovens (AREA)
  • Commercial Cooking Devices (AREA)
  • Cookers (AREA)
EP22725432.3A 2021-05-11 2022-04-25 Verfahren zum kühlen des austretenden wrasens oder dampfs aus dem garraum eines gargeräts und gargerät Active EP4337892B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE20215378A BE1029396B1 (de) 2021-05-11 2021-05-11 Verfahren zum Kühlen des austretenden Wrasens oder Dampfs aus dem Garraum eines Gargeräts und Gargerät
PCT/EP2022/060873 WO2022238100A1 (de) 2021-05-11 2022-04-25 Verfahren zum kühlen des austretenden wrasens oder dampfs aus dem garraum eines gargeräts und gargerät

Publications (3)

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EP4337892A1 EP4337892A1 (de) 2024-03-20
EP4337892B1 true EP4337892B1 (de) 2025-06-18
EP4337892C0 EP4337892C0 (de) 2025-06-18

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US (1) US20240230104A1 (pl)
EP (1) EP4337892B1 (pl)
BE (1) BE1029396B1 (pl)
ES (1) ES3033481T3 (pl)
PL (1) PL4337892T3 (pl)
WO (1) WO2022238100A1 (pl)

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Also Published As

Publication number Publication date
EP4337892A1 (de) 2024-03-20
US20240230104A1 (en) 2024-07-11
WO2022238100A1 (de) 2022-11-17
PL4337892T3 (pl) 2025-10-20
ES3033481T3 (en) 2025-08-04
EP4337892C0 (de) 2025-06-18
BE1029396A1 (de) 2022-12-07
BE1029396B1 (de) 2022-12-12

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