EP1767863A2 - High-level integratable cooking device - Google Patents

Abstract

The oven walls (44,45) are hollow and a fan (50) draws air in through the door space (45) and duct (51) as well as from the sides (44) to an air outlet opening (53).

Description

The present invention relates to a high-installation cooking appliance having at least one housing body with a muffle defining a cooking space, a housing cover for covering the housing body so that at least one gap between the housing body and the housing cover is formed, and with a vent for discharging air from the at least one gap to the outside. The present invention further relates to an associated method of operation.

Such a generic high-installation cooking appliance is off US 2,944,540 known, in which the intermediate space is designed so that located in the muffle air - especially hot air - freely emerge from the underlying muffle opening, ascend through heat convection through the gap up to an air outlet and can escape through this outwards. The purpose of the space is the improved thermal insulation of the muffle, as the temperature gradient is reduced to muffle by the rising warm air.

The disadvantage is that rising hot air, although better insulated the muffle, but the temperature of the device around the muffle to rise. For household appliances, this is disadvantageous in terms of user safety (burns) and reliability and service life (heating of functional parts, in particular electronic components).

Out DE 103 41 076 a cooking appliance with a fan for sucking cooling air and associated intake and exhaust openings is known, in which for cooling device components, a blower chamber with its Geblääseansaugöffnung with a vacuum chamber is fluidly connected, which has a number of suction ports.

Out DE 199 49 731 A1 a cooking device is known in which a fan for sucking cooling air and vapor is present, wherein a Wrasenansaugöffnung is connected via a diffuser-like Wrasenkanal with a Wrasenaustrittsöffnung in a Gargerätemuffel.

A disadvantage of these cooking appliances is that the ventilation devices are designed for cooking appliances equipped with baking car, while they are not suitable for high-installation cooking appliances due to the cramped construction.

It is the object of the present invention to provide a comparatively simple, compact and effective way of cooling a high-installation cooking appliance.

The present object is achieved by the high-mounting cooking appliance with the features of claim 1 and a method according to claim 17. Advantageous embodiments are the dependent claims individually or in combination removed.

For this purpose, the high-installation cooking appliance is equipped with a ventilation opening for supplying air from the outside into the at least one intermediate space, as well as with at least one ventilation device for generating an air flow from the ventilation opening to the ventilation opening. As a result, at least in a part of the intermediate space an air flow for cooling can be generated, which in turn causes the temperature of the housing cover to drop at this point. The design of the gap is initially not essential; it may contain various elements (eg spacers, baffles, cables, etc.) as long as only the desired ventilation is achieved. Also, not all sides of the cooking device must be equipped with a gap, and also does not have to be ventilated every gap. In the most general embodiment, the number and arrangement of the radiator, intake and / or intake is not limited. For example, in each case a separate fan for a Wrasenöffnung or a Wrasenauslass, a ventilation of a front gap and be provided for electronics.

The temperature reduction can, for example, via an adjustment of the ventilation performance of the ventilation device, a steering of the air flows, a flow cross-section u. v. m. happen. Several intermediate spaces may be fluidically related.

A sufficient insulation of the muffle can be achieved, for example, by suitable insulating materials between the housing body and muffle frame, at least in some areas, which is also energy efficient.

It is advantageous if at least one ventilatable intermediate space is the front intermediate space which is delimited at least partially by a first, inner viewing window and a further viewing window. As a result, for user safety, the area which is most likely to be touched during operation is cooled. Also, the viewing window or windows are those surface elements that are less thermally insulating compared to special insulation and thus potentially more heat.

It is favorable for heat insulation, if the front gap comprises at least a first front gap between a first, inner viewing window and a second, middle viewing window, and a second, front gap between a second, middle viewing window and a third, outer viewing window. These spaces run in a vertical direction substantially parallel.

Although the object can be achieved by a single, correspondingly designed suction opening, it is advantageous for effective large-area cooling if the at least one ventilation device is equipped with at least two suction openings. In addition, different types of intake (for example with respect to temperature, air quality) can be ventilated appropriately.

It is advantageous for a space-saving design, if the ventilation device comprises exactly one fan, possibly connected to a plurality of suction ports. The plurality of intake openings may for example be introduced in a single intake pipe, which leads to an intake opening of the fan.

In this case, the fan is conveniently a double fan, in particular a double-radial fan, which has two intake openings, in particular in the opposite direction facing suction. With double fans, two part fans are driven together and suck in air through each of the intake ports. The part fans may be the same or different, z. B. with different ventilation performance. The resulting exhaust air can be mixed or dispensed substantially separately for each part fan.

In general, but in particular when using a double fan, the at least one ventilation device is advantageously provided with at least two suction openings equipped, one of which opens to the front gap. As a result, one of the intake openings sucks at least partially, in particular mainly, cooling air through the front intermediate space.

At least one of the suction openings may open to the gap between the surface of the housing body and the housing cover. As a result, air is sucked in from the intermediate spaces, in particular the lateral and / or the rear intermediate space, over the surface of the housing body. Such an air flow cools both the vented spaces and the surface of the housing body and attached components such. B. electronic components or assemblies.

For convenient installation and effective cooling, it is advantageous if the ventilation device, in particular the fan, especially the double fan, is arranged on the surface of the housing body, and one of the suction openings is connected to a leading to the front space intake port. Through the intake passage, a sufficient suction power in the front space and thus sufficient cooling of the front gap is ensured.

It is advantageous for the extended life of luminaires in the cooking chamber when the air flow generated by the ventilation device ventilates this at least one cooking compartment light. In this case, the air flow on the suction side or the exhaust side of the fan can be generated.

It is favorable for better cooling when not used for cooling the lamp from the front space sucked - typically warmer - air for ventilation of at least one lamp, but sucked from the other spaces air.

It is particularly advantageous if the double fan with a - typically leading to the vent opening - exhaust duct is provided which contains a flow divider for separating the substantially unmixed exhaust air from the two intake ports of the double fan at least over the length of the flow divider. In the part of the exhaust duct, which leads substantially not sucked from the front space - warmer - air leads are at least one inlet air channel and an outlet air channel are arranged, which lead to the lamp and cool it with the exhaust air.

It is favorable for temperature control in the cooking chamber and for the discharge of vapor when the intake duct of the ventilation device in addition to the front gap also sucks air from an open Wrasenauslass. Together with a double (radial) fan and a flow divider, the air mixed with vapors is discharged directly to the outside, while the clean air can cool a luminaire. The vapor opening can be closed by at least one vapor valve. Advantageously, the vapor valve is arranged and dimensioned so that it can - depending on the opening or closing state - change the flow cross section between the front gap and fan; This will z. B. the ventilation through the front gap stronger (with closed vents flap) or weaker (with open vents flap, which then sets up in the flow channel).

For the largest possible ventilation of the interstices, it is advantageous if the at least one ventilation opening in the region of the underside of the housing - the housing cover and / or the housing body - is mounted, in particular on the bottom itself. It is advantageous to provide a plurality of ventilation openings.

• Fig. 1 eine perspektivische Ansicht eines an einer Wand montierten Hoch-Einbaugargeräts mit abgesenkter Bodentür;
• Fig. 2 eine perspektivische Ansicht des Hoch-Einhaugargeräts mit verschlossener Bodentür;
• Fig. 3 eine perspektivische Ansicht eines Gehäuses des Hoch-Einbaugargeräts ohne die Bodentür;
• Fig. 4 eine schematische Seitenansicht in Schnittdarstellung entlang der Linie I-I aus Fig. 1 des an die Wand montierten Hocheinbau-Gargerät mit abgesenkter Bodentür;
• Fig. 5 in Vorderansicht eine weitere Ausführungsform eines Hocheinbau-Gargeräts;
• Fig. 6 in Vorderansicht die Ausführungsform aus Fig. 5 im geschlossenen Zustand mit genauerer Beschreibung die Lage einzelner Gehäuseelemente;
• Fig. 7 eine Draufsicht in Schnittdarstellung der Ausführungsform aus Fig. 6;
• Fig. 8 eine vereinfachende Draufsicht analog zu Fig. 7 mit angedeuteten Luftströmungen;
• Fig. 9 in Draufsicht eine Detailansicht der Lüftungseinrichtung aus Fig. 8;
• Fig. 10 eine Schnittdarstellung in Seitenansicht einer Leuchtenbelüftung;
• Fig. 11 eine vereinfachende Draufsicht analog zu Fig. 7 auf eine Lüftungseinrichtung mit Wrasenklappe;
• Fig. 12 eine Schnittdarstellung in Seitenansicht der Lüftungseinrichtung mit Wrasenklappe aus Fig. 11.

The invention will be described in more detail below with reference to the embodiments shown in the attached schematic figures. Show it:

• 1 is a perspective view of a mounted on a wall Hoch-Einbaugargeräts with lowered bottom door.
• 2 is a perspective view of the high-Einhaugargeräts with closed bottom door.
• 3 is a perspective view of a housing of the Hoch-Einbaugargeräts without the bottom door.
• 4 shows a schematic side view in a sectional view along the line II from FIG. 1 of the high-mounted cooking appliance mounted on the wall with the bottom door lowered;
• 5 shows a front view of another embodiment of a high-installation cooking appliance;
• Fig. 6 in front view, the embodiment of Figure 5 in the closed state with a more detailed description of the position of individual housing elements.
• Fig. 7 is a plan view in section of the embodiment of Fig. 6;
• FIG. 8 is a simplified plan view analogous to FIG. 7 with indicated air flows; FIG.
• FIG. 9 is a plan view of a detail of the ventilation device of FIG. 8; FIG.
• 10 is a sectional side view of a lighting fixture;
• 11 is a simplified plan view similar to Figure 7 on a ventilation device with vents flap.
• 12 is a sectional side view of the ventilation device with vents flap of FIG. 11th

1 shows a high-installation cooking appliance with a housing 1 is shown. The back of the housing 1 is mounted on a wall 2 in the manner of a hanging cabinet. In the housing 1, a cooking chamber 3 is defined, which can be controlled via a front side in the housing 1 introduced viewing window 4. In FIG. 4 it can be seen that the cooking space 3 is delimited by a muffle 5, which is provided with a heat-insulating sheath, not shown, and that the muffle 5 has a bottom-side muffle opening 6. The muffle opening 6 is closable with a bottom door 7. In Fig. 1, the bottom door 7 is shown lowered, being with its underside in contact with a worktop 8 a kitchen device. In order to close the cooking chamber 3, the bottom door 7 is in the position shown in FIG. 2, the so-called. "Zero position" to adjust. To adjust the bottom door 7, the Hoch-Einbaugargerät a drive device 9, 10 on. The drive device 9, 10 has a drive motor 9 shown in dashed lines in FIGS. 1, 2 and 4, which is arranged between the muffle 5 and an outer wall of the housing 1. The drive motor 9 is arranged in the region of the rear side of the housing 1 and is, as shown in FIGS. 1 or 4, in operative connection with a pair of lifting elements 10, which are connected to the bottom door 7. 4, each lifting element 10 is designed as an L-shaped carrier, whose vertical leg extends from the housing-side drive motor 9 To adjust the bottom door 7, the drive motor 9 can be actuated by means of a control panel 12 and a control circuit 13, which is arranged according to FIGS. 1 and 2 at the front of the bottom door 7. As shown in Fig. 4, the control circuit 13 is located behind the control panel 12 within the bottom door 7. The control circuit 13, which consists of several spatially and functionally separated and over a communication bus communicating circuit boards composed, represents a central control unit for the device operation and controls and / or regulates z. As a heating, a method of the bottom door 3, a conversion of user input, a lighting, a pinch protection, a clocking of the radiator 16, 17, 18, 22 and much more.

FIG. 1 shows that an upper side of the bottom door 7 has a hob 15. Almost the entire surface of the hob 15 is occupied by radiators 16, 17, 18, which are indicated in phantom in Fig. 1. In Fig. 1, the radiator 16, 17 are two spaced apart, different sized cooking hob, while the radiator 18 is provided between the two cooking area heaters 16,17 surface heating element, which almost encloses the cooking area heaters 16, 17. The hotplate heaters 16, 17 define for the user associated cooking zones or hobs; the hotplate heaters 16, 17 together with the surface heating element 18 define a bottom heat zone. The zones may be indicated by a suitable decoration on the surface. The radiators 16, 17, 18 are each controlled via the control circuit 13.

In the exemplary embodiment shown, the radiators 16, 17, 18 are configured as radiant heaters, which are covered by a glass ceramic plate 19. The glass ceramic plate 19 has approximately the dimensions of the top of the bottom door 7. The glass ceramic plate 19 is further equipped with mounting holes (not shown) through the base for holding support members 20 for Gargutträger 21 protrude, as shown in Fig. 4. Instead of a glass ceramic plate 19, other - preferably quick-responding - covers can be used, for. B. a thin sheet.

With the help of a control panel 12 provided in the control knob, the high-installation cooking appliance can be switched to a cooking or a bottom heat mode, which will be explained below.

In the hob mode, the cooking surface heaters 16, 17 can be controlled individually by means of control elements 11, which are provided in the control panel 12, via the control circuit 13, while the surface heating element 18 remains out of operation. The hotplate mode is executable with the bottom door 7 lowered, as shown in Fig. 1. But it can also be operated with closed cooking chamber 3 with raised floor door 7 in an energy saving function.

In the lower heat mode, not only the hotplate heaters 16, 17 but also the surface heating element 18 are activated by the control device 13.

In order to achieve the most uniform possible tanning image of the food during the bottom heat, it is crucial that the cooking surface 15 providing the bottom heat has a uniform distribution of the heat output over the surface of the hob 15, although the heating elements 16, 17, 18 have different nominal powers. Preferably, therefore, the radiators 16, 17, 18 are not switched by the control circuit 13 to a continuous operation, but the power supply to the radiators 16, 17, 18 is clocked. The different sized nominal heating powers of the radiator 16, 17, 18 are individually reduced so that the radiators 16, 17, 18 provide a uniform over the surface of the hob 15 distribution of the heat output.

Fig. 3 shows schematically the position of a circulating air pot 23 with a circulating air motor and an associated ring radiator, z. B. for generating hot air in a hot air operation. The open to the cooking chamber 3 Umlufttopf 23 is separated from this typically by a baffle (not shown). In addition, a mounted on an upper side of the muffle 5 Oberhitzeheizkörper 22 is provided, the single-circuit or mehrkreisig, z. B. with an inner and an outer circle, can be executed. By the control circuit 13, the various operating modes, such as, for example, top heat, hot air or Schnellaufheizbetrieb, by an appropriate activation and adjustment of the heating power of the radiator 16, 17, 18, 22, possibly with activation of the fan 23, are set. The adjustment of the heating power can be done by appropriate timing. In addition, the hob 15 can also be designed differently, for. B. with or without roasting zone, as a pure - one or mehrkreisige - warming zone without cooktops and so on. The housing 1 has a seal 24 towards the bottom door 7.

The control panel 12 is arranged mainly at the front of the bottom door 7. There are alternatively other arrangements conceivable, for. B. at the front of the housing 1, divided into different sub-fields and / or partially Side surfaces of the cooking appliance. Further designs are possible. The controls 11 are not limited in their design and can, for. B. z. As control knob, toggle switch, pushbuttons and membrane keys include the display elements 14 include z. B. LED, LCD and / or touchscreen displays.

In Fig. 5 is schematically and not to scale a high-mounted cooking appliance shown from the front, in which the bottom door 7 is open on contact with the worktop 8. The closed state is shown in dashed lines.

In this embodiment, two traversing panels 25 are located on the front side of the fixed housing 1. Each traversing panel 25 comprises two pushbuttons, namely an upper CLOSE button 25a for a bottom door 7 traveling upwards in the closing direction and a lower OPEN button 25b for one Without automatic operation (see below) moves the bottom door 7 only by continuous simultaneous pressing the CLOSE buttons 25a both traversing panels 25 upwards, if possible; also moves the bottom door 7 only by continuous simultaneous pressing of the UP buttons 25b both traversing panels 25 down, if possible (manual operation). Since in manual operation an increased operator attention of the user is given and also both hands are used here, an anti-trap is then optional. In an alternative embodiment, traversing panels 26 are mounted on opposite outer sides of the housing 1 with corresponding ZU buttons 26a and UP buttons 26b, as shown in dotted lines.

The dot-dashed control circuit 13, which is located inside the bottom door 7 behind the control panel 12, the drive motor 9 switches so that the bottom door 7 gently anfährt, d. H. not abruptly by simply hiring the drive motor 9, but by means of a defined ramp.

In this exemplary embodiment, the control circuit 13 comprises a memory unit 27 for storing at least one destination or travel position P0, P1, P2, PZ of the bottom door 7, preferably with volatile memory components, eg. B. DRAMs. If a target position P0, P1, P2, PZ is stored, the bottom door can move independently after actuation of one of the keys 25a, 25b and 26a, 26b of the traversing panels 25 and 26 in the set direction until the next target position is reached or one of the buttons 25a, 25b and 26a, 26b again is pressed (automatic mode). In this embodiment, the lowest target position PZ corresponds to the maximum opening, the (zero) position P0 corresponds to the closed state, and P1 and P2 are freely adjustable intermediate positions. If the last target position for one direction has been reached, manual operation must also be continued if this is possible (ie the last end positions do not correspond to a maximum open or closed final state). Analog must then, if for one direction no target position is stored - which z. B. for an upward movement into the closed position would be the case if only PZ is stored, but not P0, P1, P2 - are driven in this direction in manual mode. If no target position is stored, eg. B. in a new installation or after a power disconnection, no automatic mode is possible. If the bottom door 7 is moved in automatic mode, an anti-pinch protection is preferably activated.

Automatic mode and manual operation are not mutually exclusive: by permanently actuating the positioning panel (s) 25, 26, the bottom door 7 also moves in manual mode if a target position could be approached in this direction. It can be z. B. a maximum actuation time of the traversing fields 25 and 26, respectively, of the associated keys 25a, 25b and 26a, 26b, are set to activate the automatic mode, z. B. 0.4 seconds.

A target position P0, P1, P2, PZ may be any position of the bottom door 7 between and including the zero position P0 and the maximum open position PZ. However, the maximum stored opening position PZ need not be the position with abutment on the work surface 8. Storing the target position P0, P1, P2, PZ can with the bottom door 7 at the desired target position P0, P1, P2, PZ, by, for example, lasting several seconds (eg, lasting two seconds), pressing a confirmation key 28 in the control panel 12th be performed. Existing optical and / or acoustic signal transmitters which output corresponding signals after storing a target position are not shown for the sake of clarity. A start-up of the desired target position P0, P1, P2, PZ to be set takes place, for example, by - in this embodiment - ambidextrous operation of the movement panels 25 or 26 and manual method to this position.

In the memory unit 27, only one or, as shown in this embodiment, a plurality of target positions P0, P1, P2, PZ can be einspeicherbar.

In the case of several target positions P0, P1, P2, PZ, these can be approached successively by actuating the corresponding travel keys 25a, 25b or 26a, 26b. Through several target positions P0, P1, P2, PZ, the high-installation cooking appliance can be easily adapted to the desired operating height of multiple users. The target position (s) are advantageously erasable and / or overwritten. In one embodiment, for example, only one target position can be stored in the opened state, while the zero position P0 is automatically recognized and can be approached automatically. Alternatively, the zero position P0 must be stored in order to be automatically approachable.

It is particularly advantageous for ergonomic use if the or a target position P1, P2, PZ opens the bottom door 7 at least about 400 mm to about 540 mm (ie P1-P0, P2-P0, PZ-P0 ≥ 40cm to 54 cm). In this opening dimension the food supports 21 are easy to insert into the support members 20. It is advantageous if the viewing window 4 is mounted approximately at eye level of the user or slightly below, z. B. by means of a template that indicates the dimensions of the cooking appliance.

Not shown is an existing power failure override for bridging of about 1 to 3 s power failure, preferably up to 1.5 s power failure.

The drive motor 9 from FIG. 1 has at least one sensor unit 31, 32 arranged on a motor shaft 30, possibly in front of or behind a transmission, in order to measure a travel path or a position and / or a speed of the bottom door 7. For example, the sensor unit may include one or more induction, reverberation, opto, SAW sensors, and so forth. Here are for easy distance and speed measurement here two Hall (part) elements 31 offset by 180 ° - ie opposite - attached to the motor shaft 30, and a Hallmeßaufnehmer 32 is fixedly mounted at this area of the motor shaft spaced. If a Hall element 31 then moves past the measuring transducer 32 when the motor shaft 30 rotates, a measuring or sensor signal is generated which is, to a good approximation, digital. With (not necessarily) two Hall elements 31, therefore, two signals are output during one revolution of the motor shaft 30. By time evaluation of these signals, z. As their time difference, the speed vL of the bottom door 7 can be determined, for example via comparison tables or a conversion in real time in the control circuit 13. By addition or subtraction of the measuring signals, a travel or a position of the bottom door 7 can be determined.

A speed control can realize the speed, for example via a PWM-controlled power semiconductor.

For zero point determination, the distance measurement is automatically re-adjusted by initialization in the zero position P0 of the bottom door 7 at each start, so z. B. a faulty sensor signal output or recording is not traditional.

The drive motor 9 is operated by actuation of both traversing panels 25 and 26, even when the main switch 29 is turned off.

Instead of two separate switches per traversing field 25, 26 and a single switch per traversing field is possible, for. B. a toggle switch with a neutral position, which switches only under pressure. Other shapes are possible. Also, the nature and arrangement of the controls 28,29 of the control panel 12 is not limited.

The arrangement and distribution of the control circuit 13 is flexible and not limited, so it can be several boards, z. B. include a display board, a control board and an elevator board, which are spatially separated.

A 4 mm opening dimension can be detected by limit switches 33, which deactivate anti-pinch protection when actuated.

The high-installation cooking appliance can also be designed without a storage unit 27, in which case no automatic operation is possible. This can be for increased operating safety, eg. B. as protection against pinching, be useful.

Fig. 6 shows schematically (not to scale) indicated from the front, the position of individual elements of the housing 1 in the closed state, in which the bottom door 7 on the muffle 5 final touches and thereby the housing 1 visually terminates. The housing 1 consists of an (inner) housing body 34 (shown in dashed lines) and a housing cover or cover 35, which surrounds the housing body 34 at least front and side. The gap 36 between the housing body 34 and housing cover 35 is designed so that cooling air can flow at least partially. These are in the housing cover 35 lower ventilation holes 37, z. As ventilation slots, provided which are mounted lower than the upper surface 38 of the housing body 34, preferably in an area in the vicinity of the muffle opening or the lift floor 7. The ventilation openings 37 are here introduced at the bottom of the housing cover 35; but can also be present for example laterally. Accordingly, there are one or more upper vents 39, z. B. a vent slot in the upper part of the housing cover 35, especially in the ceiling. Thereby, an air flow of cooling air through the gap 36 can be constructed, typically from bottom to top, which is then discharged through the ceiling.

In the housing body 34, the muffle 5 (dotted drawn) is introduced, the associated space 40 - is lined - with the exception of the front - with insulating material. The muffle 5 is conversely configured U-shaped. In order to look into the cooking chamber 3, a plurality of viewing windows 4 are present, namely a muffle 5 directly covering the first (inner) window 41 (dash-dotted lines), which therefore at least partially represents a wall of the muffle 5, further through the housing body 34th held second (middle) window 42 (also indicated by dash-dotted lines) and a third (outer) viewing window 43 in the housing cover 35th

Optionally, additional intermediate windows can be drawn in (not shown), which are preferably fastened to the housing body 34, or fewer viewing windows 4 may be present, eg. B. only the inner and outer windows 41, 43. From, for example, the ventilation slots 37, 39 may be introduced in a different arrangement and shape.

Fig. 7 shows a plan view of the housing 1 corresponding to the sectional area III-III of Fig. 6 (ie without upper housing wall) a more detailed, not true to scale view of the housing interior with various elements arranged therein. From this point of view, the spaces 36 between the housing body 34 and housing cover 35 are clearly visible, namely the lateral spaces 44, the front gap 45 and the rear gap 46. Because of the three viewing windows 41, 42, 43, the front gap 45 is perpendicular to a first front intermediate space 45a between the middle viewing window 42 and outer viewing window 43 and a second front gap 45b between the middle viewing window 42 and inner viewing window 41 divided. Of course The spaces must not be empty, but may have different elements therein, such as. As lifting elements 10, brackets, bushings, insulation, air guide elements such as baffles, screws, struts, etc., and not every space 36 must allow a significant flow of air.

On the housing body 34 are in particular attached: electrical or electronic assemblies 47 such as the control circuit 13, a drive device 48 and a ventilation device 49th

The ventilation device 49 comprises at least one fan, which in this embodiment is exactly one fan which draws in air from two directions by means of two suction openings. For this purpose, a two-part fan is advantageously used, in which in addition the exhaust air is output at least substantially unmixed. Particularly suitable is the double-radial fan 50 shown here, which has two opposite suction openings and laterally discharges sucked-in air. In this case, the two sucked air flows are discharged substantially laterally parallel to each other.

In the design form shown here, an intake opening of the double-radial fan 50 is connected to an intake channel 51 which at least partially covers the front intermediate space 45 and thereby draws cooling air from below from the lower ventilation openings 37 through the front intermediate space 45 during operation. Thereby, the front gap 45 is cooled for improved user safety, which provides a rather low thermal insulation because of the viewing window 4, 41-43.

The other (rear) suction port of the double-radial fan 50 is open. As a result, cooling air is sucked in particular from the lateral interspaces 44 and the rear gap 46 and flows over the upper surface 38 to the fan 50. As a result, the components arranged on the upper surface 38 are also circulated or flowed through and thus cooled. This is particularly advantageous for the electronic modules 47

The exhaust air of the fan 50 passes through an exhaust duct 52 to an overhead air outlet 53 which blows out the air through the vent opening (s) 39 of FIG.

The flow conditions and further details of this embodiment are described below in FIGS. 8 to 10.

The drive device 48 comprises a motor 9, which is fastened centrally on the surface 38 of the housing body 34 and on which a guide housing 54 rests. Through the guide housing 54 run two guide channels (not shown). The guide housing 54 has a circular recess for insertion of a pinion 55 of the motor 9. The guide channels lead open laterally past the recess, so that located in the guide channels ropes, cables, etc. are brought into engagement with the pinion 55. At the outer openings of the guide channels, so here four openings, guide tubes 56 are mounted, which together with the guide channels form continuous cable channels. The guide tubes 56 extend in this embodiment from the guide housing 54 to the edge of the upper surface 38 in an area above the lifting elements 10 and further beyond the edge down into the lifting elements 10 into it.

In each of the two cable channels runs a pitch cable as a drive cable (not shown). The pitch cable has a bendable metal core and is wrapped in wire. One end of each pitch cable is firmly connected to the bottom door 7, the other is free. Since both pitch cables are on opposite sides in engagement with the pinion 55, they are linearly displaced by rotation of the pinion 55 in opposite directions. The ascending cable drive can be obtained, for example, from WEBASTO, Germany.

The guide tubes 56 are elastically deformable, z. B. molded from aluminum injection. At least one load-carrying guide tube 56 (ie, a guide tube 56 which guides a portion of a pitch cable which is fixedly connected to the floor door 7 directly or indirectly, thereby bearing a load on this portion of the pitch cable) rests on a support 57 , The bearing force depends on the size of the load on the pitch cable. In this embodiment, such a support 57 is provided for each load-carrying guide tube 56. The pads 57 are located substantially at the edge of the upper surface 38 of the housing body 34 so that the load deflectable length - the "arm" - of the guide tube 56 becomes large. As a result, the load dependence of the respective guide tube 56 on the support 57 aufgeübt, substantially vertical, force designed as large as possible. The contact force depends, for example, on the loading of the bottom door 7 or placing it on a base or an object. By measuring the contact force, for example, an overload of the bottom door 7 or a pinch protection can be realized.

The length of the guide tubes 56 is of structural design and may be relatively short or may extend to the attachment of the pitch cable to the bottom door 7 (when closed).

To use the support of the pitch cable for load measurement, the use of guide tubes 56, although for reasons of sliding and abrasion advantageous, but not essential. It is also possible to guide the pitch cables - or cables or ropes in general - freely over suitably positioned (eg over the edge of the surface reaching) supports. The requirements are then conveniently carried out accordingly, z. B. made of a suitable hard and / or lubricious material, surface-treated or surface-coated.

Also, the use of a riser drive is not mandatory, but due to the simple design and installation and the precise displacement advantageous. Alternative drives include, for example, those driving a cable drum, etc.

FIG. 8 shows a simplified diagram analogous to FIG. 6 with air movements indicated schematically by dashed arrows. For a better overview, fans 50, intake duct 51 and exhaust duct 52 are shown without cover.

By the rear, here wall side, opening of the (double radial) fan 50 cooling air is sucked up from the side spaces 44 and the rear gap 46 and thereby guided for cooling via the electronics 47 at the top 38. Through the front opening of the fan 50 air from the - here divided into two - front intermediate space 45 is sucked up with the aid of an attached over the gap 45 intake passage 51. The sucked air streams are then blown laterally into and through the exhaust air passage 52 and then through the air outlet 53 to the outside. The at double radiator 50 substantially parallel running - so not mixed - exhaust air is kept separated by a flow divider 58 and a partition in the exhaust duct 52 at least over this route. The projection of the air outlet 53 is shown dotted. In this figure, one also recognizes an actuatable Wrasen flap 59, which opens or closes a Wrasenöffnung or a Wrasenauslass (not shown) of the cooking chamber 3.

9 schematically shows a variant of the exhaust air duct 52 from FIG. 8 with an inlet air duct 60 and an associated outlet air duct 61 integrally introduced therein. The two ducts 60, 61 serve to cool a lamp 63, as is explained in more detail in FIG. Here, the intake air passage 60 is a port having an opening inclined toward the fan 50, so that air flowing in the exhaust passage 52 effectively presses into the intake air passage 60. The inlet air channel 60 leads at the other end into a lamp (see also Fig. 10), the lamp (s) are cooled by the air flow. The outlet air duct 61 allows the air to escape from the luminaire back into the exhaust duct 52.

In this embodiment, the flow divider 58, together with the use of a double-radial fan 50, ensures that substantially only the air sucked in through the lateral spaces 45 and / or the rear gap 46 reaches the light 62 via the air channels 60, 61; since the air drawn in from the front intermediate space 45 is mixed with air from the cooking chamber 3 at-typically-the open vapor flap 59 and this air is comparatively contaminated. z. B. by Gardämpfe.

Fig. 10 shows a sectional side view along the section line IV-IV of Fig. 9, the arrangement of inlet air duct 60 and outlet air duct 61, as a nozzle through the wall of the housing body 34, filled with insulating space 40 (dashed lines) and the wall the muffle 5 are led to the lamp 62. In this embodiment, the intake air passage 60 is provided with a wind catcher at its end extending into the exhaust passage to effectively direct the flowing air into the light 62.

The luminaire 62 here is a ceiling lamp (see also FIG. 3) with a lamp 63 in the form of a mains voltage incandescent lamp, which is surrounded by a lamp housing 64. As indicated here by the dashed arrows, the - comparatively cool - air sweeps past the lamp 63 and thereby cools it, as well as by entrainment of the - comparatively warm - air in the lamp housing 64.

Fig. 11 shows another embodiment of a ventilation device 49, in which now the intake passage 51, the vapor flap 59, an actuator holder 65 and a pivotable, resilient actuating lever 66 are made in one piece. The operating lever 66 is connected via an integrated connecting element 67 with the vapor flap 59 for opening and closing the same. In the Aktuatorhalterung 65 a dotted inscribed actuator 68 can be used, which rests by a plunger 69 on the lever 66.

In this embodiment, in the idle or open state, which is present in most operating modes, the actuator 68 is contracted and thus moved in the direction of its rest position WO. In this rest position, the lever 66 is in rest position, and the Wrasenklappe 59 is open. The vapor flap 59 has a spring to keep it open at rest.

In the actuated or closed state, the actuator 68 is actuated and expands in the direction of WZ. As a result, the plunger 69 is moved in the same direction WZ and deflects the lever 67 from its rest position. As a result, the lever 67 pulls the vapor flap 59 via the connecting element 67. This closed state is activated in particular in a pyrolytic self-cleaning, in which high temperatures in the cooking chamber 3 are required.

The actuator 68 may be, for example, a Wachsaktuator, which when activated, z. B. on the control board after selecting an operating mode, expands by a heat development and contracts again without activation by cooling. Other types of actuators are possible.

Fig. 12 shows - not to scale - the housing 1 of Fig. 11 in cross section along the section line VV of Fig. 11 in the open state. It can be seen that the opening of the intake channel 51 covers the first and the second front gap 45a, 45b, as well as the vapor flap 59 and the vapor outlet 59a. The vapor flap 59 opens in the direction of the fan 50 and is shown open. In the open state, air is thus sucked from the cooking chamber 3 through the Wrasenauslass 59a and, as described above, passed to the outside. It can be seen that the opened vapor flap 59 reduces the flow cross-section to the associated opening of the fan 50 in comparison to a closed position. In the embodiment shown here, the open vapor flap 59 defines the smallest flow cross-section in the intake channel 51 and thus acts as an air flow regulator. By this dual function of the Wrasenklappe 59 firstly as a closure element of the Wrasenöffnung and secondly as a flow regulator is the ventilation adjustable in the front part particularly advantageous. Because in the open state, when the temperature in the cooking chamber 3 is not set so high (typically ≤ 250 ° C), the air flow through the front gap 45 is not maximum because of the smaller flow cross-section, and need not be. If, however, in the closed state - especially in a pyrolysis - the temperature in the cooking chamber 3 can become very high (typically> 400 ° C), and the flow cross-section in the intake passage 51 is greater, so that the ventilation performance through the front gap 45 is higher, causing the View window 4 can be cooled more. This increase in ventilation performance at high temperatures in the cooking chamber 3, z. B. in pyrolysis or rapid heating, increases the operational and user safety.

Bezuaszeichenliste

1

casing

2

wall

3

oven

4

window

5

muffle

6

muffle opening

7

bottom door

8th

countertop

9

drive motor

10

lifting

11

operating element

12

Control panel

13

control circuit

14

indicators

15

hob

16

Hotplate heating elements

17

Hotplate heating elements

18

Panel heater

19

Glass ceramic plate

20

supporting member

21

food support

22

Top heat radiator

23

recirculated air pot

24

poetry

25

Verfahrschaltfeld

25a

Travel switch upwards

25b

Travel switch down

26

Verfahrschaltfeld

26a

Travel switch upwards

26b

Travel switch down

27

storage unit

28

confirmation key

29

main switch

30

motor shaft

31

Hall element

32

transducer

33

limit switch

34

housing body

35

housing cover

36

gap

37

lower vents

38

upper surface of the housing body (34)

39

upper ventilation opening

40

gap

41

first (inner) window

42

second (middle) window

43

third (outer) window

44

lateral spaces

45

front gap

45a

first front gap

45b

second front gap

46

rear gap

47

Electrical or electronic assemblies

48

driving means

49

vent

50

Fan

51

intake port

52

exhaust duct

53

air outlet

54

guide housing

55

gear

56

guide tubes

57

edition

58

flow divider

59

Flap valve

59a

Wrasenauslass

60

Intake air passage

61

Auslassluftkanal

62

lamp

63

lamp

64

lamp housing

65

Aktuatorhalterung

66

actuating lever

67

connecting element

68

actuator

69

tappet

P0

zero position

P1

intermediate position

P2

intermediate position

PZ

end position

Claims (19)

High-installation cooking appliance, with at least - A housing body (34) having a cooking chamber (3) delimiting muffle (5), - A housing cover (35) for covering the housing body (34) so that at least one intermediate space (44, 45, 46) between the housing body (34) and the housing cover (35) is formed and - A vent opening (39) for discharging air from the at least one intermediate space (44, 45, 46) to the outside, characterized in that - A ventilation opening (37) for supplying air from the outside in the at least one intermediate space (44, 45, 46) is present, and - in that at least one vent means (49) for generating an air flow from the ventilation opening (37) for venting opening (39) is present. High-installation cooking appliance according to claim 1, characterized in that at least one ventilatable intermediate space of the front intermediate space (45) which is at least partially limited by a first, inner viewing window (41) and another viewing window (42,43). High-installation cooking appliance according to claim 2, characterized in that the front intermediate space (45) comprises at least a first front gap (45a) between a first, inner viewing window (41) and a second, middle viewing window (42), and a second, front Interspace (45b) between a second, middle viewing window (42) and a third, outer viewing window (43). High-installation cooking appliance according to one of the preceding claims, characterized in that the at least one ventilation device (49) is equipped with at least two suction openings. High-installation cooking appliance according to one of the preceding claims, characterized in that the ventilation device (49) comprises exactly one fan (50). High-installation cooking appliance according to claim 5, characterized in that the fan (50) is a double fan, in particular a double-radial fan. High-installation cooking appliance according to one of the preceding claims, characterized in that the at least one ventilation device (49) is equipped with at least two suction openings, one of which opens to the front intermediate space (45). High-installation cooking appliance according to one of the preceding claims, characterized in that the at least one ventilation device (49) is equipped with at least two suction openings, one of which extends to the intermediate space between the surface (38) of the housing body (34) and the housing cover (35). opens. High-installation cooking appliance according to one of the preceding claims, characterized in that the ventilation device (49) comprises a fan (50) in the form of a double fan with two suction openings, wherein - The fan (50) on the surface (38) of the housing body (34) is arranged, and - One of the suction openings with a front space (45) leading to the intake passage (51) is connected. Hocheinbau-cooking appliance according to claim 9, characterized in that the other of the suction openings opens to the space between the surface (38) of the housing body (34) and the housing cover (35). High-installation cooking appliance according to claim 10, characterized in that at least one electronic assembly (47) is arranged between the housing body (34) and the housing cover (35) that sweeps through the other of the intake air sucked through the at least one electronic assembly (47). High-installation cooking appliance according to one of the preceding claims, characterized in that the air flow generated by the ventilation device (49) ventilates at least one luminaire (62). Hocheinbau-cooking appliance according to claim 12, characterized in that the ventilation device (49) is equipped with a fan (50) in the form of a double fan, wherein the not from the front space (45) sucked air for ventilation of at least one lamp (62) is used. High-installation cooking appliance according to claim 13, characterized in that the double fan (50) is equipped with an exhaust duct (52) containing a flow divider (58) for separating the substantially unmixed exhaust air from the two intake ports, wherein in the part of the exhaust duct (52) substantially guiding the air not drawn from the front space (45), at least one inlet air passage (60) and one outlet air passage (61) leading to the light (62). Hocheinbau-cooking appliance according to one of the preceding claims, characterized in that an intake duct (51) of the ventilation device (49) in addition to the front intermediate space (45) and air from an open Wrasenauslass (59a) sucks, in particular from a means of a Wrasenklappe (59) closable Wrasenauslass (59a). High-installation cooking appliance according to one of the preceding claims, characterized in that the at least one ventilation opening (37) is located on the underside of the housing (1). Method for ventilating a cooking appliance according to one of the preceding claims, characterized in that the at least one ventilation device (49) is equipped with at least two suction openings, characterized in that - By one of the intake substantially air from the front space (45) is sucked, and - is sucked through the other of the intake openings substantially air from at least one lateral space (44) and / or a rear space (46). A method according to claim 17, characterized in that by the one of the suction and air from an open vapor flap (59) is sucked. A method according to claim 17 or 18, characterized in that air sucked through the other of the suction is passed through at least one electronic assembly (47).

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