EP2913591B1 - Appareil de cuisson doté d'un refroidissement spécifique d'un dispositif d'éclairage - Google Patents

Appareil de cuisson doté d'un refroidissement spécifique d'un dispositif d'éclairage Download PDF

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Publication number
EP2913591B1
EP2913591B1 EP15153968.1A EP15153968A EP2913591B1 EP 2913591 B1 EP2913591 B1 EP 2913591B1 EP 15153968 A EP15153968 A EP 15153968A EP 2913591 B1 EP2913591 B1 EP 2913591B1
Authority
EP
European Patent Office
Prior art keywords
air
cooking
light source
light
light guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP15153968.1A
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German (de)
English (en)
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EP2913591A1 (fr
Inventor
Bernhard Bauer
Joschka Bär
Hans Lappat
Peter Mallinger
Philipp Nather
Philipp Ruzanski
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP2913591A1 publication Critical patent/EP2913591A1/fr
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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
    • F24C15/008—Illumination for 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
    • F24C15/006—Arrangements for circulation of cooling air
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6444—Aspects relating to lighting devices in the microwave cavity

Definitions

  • the invention relates to a cooking appliance with a cooking chamber which is bounded by walls of a muffle.
  • the cooking appliance comprises an air guiding device, which has at least one air duct for supplying a cooling air flow to a lighting device of the cooking appliance arranged for illuminating the cooking chamber.
  • the air duct is arranged in a positional arrangement and viewed in the vertical direction of the cooking appliance above a muffle, and the air guiding device has an air shaft bottom and an air duct cover.
  • a cooking appliance is for example from the EP 2 333 425 A1 known.
  • the local, relatively large built incandescent lamp is attached to a ceiling wall of the muffle, so that it extends partially with their filament into the cooking chamber.
  • the air duct is designed there so that the sucked by a fan from above air is distributed into different branches and in connection with the local design only pressure shaft sections are present, which then form the air shaft.
  • a corresponding embodiment is also from the EP 2 463 588 A1 known.
  • the light sources extend even partially into the cooking chamber, so that they are exposed to corresponding temperature influences.
  • due to the size of the lamps shown a corresponding space requirement. In particular, then the cooling effect is limited.
  • the FR 2 930 815 A1 describes a baking oven according to the preamble of claim 1, in which a lamp arranged outside a cooking chamber is cooled by means of an air flow conveyed by a fan.
  • An inventive cooking appliance comprises a cooking chamber which is bounded by walls of a muffle.
  • the cooking appliance comprises an air guiding device, which has at least one air duct for supplying a cooling air flow to a lighting device of the cooking appliance arranged for illuminating the cooking chamber.
  • the air duct is viewed in the vertical direction of the cooking appliance above or above the muffle of the cooking appliance, and the air guiding device has an air shaft bottom and an air shaft cover.
  • the lighting device has at least one light source arranged completely outside the cooking chamber.
  • the light source is flowed around by the cooling air flow.
  • the cooling air flow is very specific. It is guided from a device chamber of the cooking appliance, which is viewed in the vertical direction of the cooking appliance over the duct cover, into a pressure shaft section of the duct which is viewed with respect to a fluidic position of a fan in the air duct device.
  • the air-guiding device is also substantially designed to have a suction-chamber section separate from the equipment compartment and viewed in relation to a fluidic position of the fan in the air-guiding device.
  • a very specific air duct is designed, which not only, as in the prior art consists of pressure shaft sections, but also has at least one suction shaft section in addition to at least one pressure shaft section.
  • the blower is arranged in particular in the air guiding device such that, on the one hand, air is sucked through the operation of the blower in the air shaft and thus sucked towards the blower and this takes place via the suction chute section.
  • the air duct with the pressure duct section comprises a region in which the air is forced away from the blower by its operation.
  • the sucked in this respect of the environment and then directly into the door-directed air is then introduced or sucked in particular in an upper region of the door in the suction shaft section of the air duct, this is also effected via the fan of the air ducting device and is then sucked to the blower, where it is then passed on to the pressure shaft section and then discharged from this at the end to the outside.
  • the illumination device has at least one light guide through which the light emitted by the light source can be conducted into the cooking chamber.
  • the positionally external arrangement of the light source is favored to the cooking chamber to the effect that a maximum amount of light emitted from the light source light can get into the cooking chamber.
  • a particularly emphasized illumination of the cooking chamber in embodiment with an externally arranged to the cooking light source is made possible.
  • a first optical waveguide extends in the form of a rod and projects through the pressure shaft section and extends through an opening in the air shaft bottom. Due to this local specification of the position of the optical waveguide and its shape design, a maximum possible amount of light is introduced into the oven and also reaches the cooling effect of the cooling air flow to the light guide. Also, the light guide, which is exposed at least at its end facing the cooking chamber there and exposed to the temperature influences in the cooking chamber, in the context, even with a corresponding Temperaturbeetzschung a positive cooling effect by the extension into the pressure shaft section and the associated direct flow around the Coming cooling air stream.
  • the lighting device has a heat sink, which is thermally coupled to the air shaft bottom and / or the duct cover.
  • a heat sink which is thermally coupled to the air shaft bottom and / or the duct cover.
  • an additional heat sink for the lighting device and in particular the light source is achieved in this embodiment by an additional heat sink anyway, on the other hand, a further improvement of the cooling effect and thus also the heat dissipation is additionally made possible by the very specific thermal coupling of this heat sink beyond. Because by the thermal coupling of the heat sink to the air shaft bottom and / or the duct cover, which are relatively large in area relative to the cooling body, a corresponding heat emission to these components is possible.
  • the invention therefore achieves an improvement in the positional arrangement of the light source and its thermal management in many respects with the embodiment.
  • the light source is a light-emitting diode.
  • a light-emitting diode is constructed very compact and is very energy efficient operable.
  • light-emitting diodes are more sensitive with regard to temperature influences, so that the invention for a light-emitting diode is of particular advantage.
  • At least one light source extends into the pressure shaft section.
  • this optical fiber also extends through an opening in a top wall of the muffle when the cooking appliance is an oven without a microwave function.
  • the top wall of the muffle is preferably also formed by the air shaft bottom, so that here an assembly of these two functions takes place.
  • the lighting device has a first sub-device, which is formed for light irradiation in the oven by a top wall of the muffle.
  • a first heat sink of this first divider is disposed on the duct cover, and at least one air passage hole is formed in the heat sink, through which the flow of cooling air from the equipment space into the pressure chute portion can be introduced.
  • this first heat sink is a plate.
  • the heat sink is designed very flat.
  • this embodiment also allows the formation of a plurality of holes for passing the cooling air flow from the equipment compartment into the air shaft.
  • this embodiment as a plate as large as possible contact with the air shaft bottom and / or the air duct cover is reached, so that here too as large as possible and with respect to the heat dissipation and the transfer of heat from the heat sink to this device of the duct is particularly favored.
  • this first heat sink is arranged on the duct cover.
  • the above advantages are favored again.
  • the illumination device has a second sub-device, which is designed for light irradiation in the cooking chamber through a side wall of the muffle.
  • a second optical fiber of the second sub-assembly is arranged outside of the cooking chamber and in an upper region of the side wall of the muffle extending into an opening in the side wall.
  • a light irradiation in the cooking chamber is provided laterally in the second sub-device.
  • Both subdevices each have their own specific advantages for illuminating the cooking chamber, which stand out in a combination of both sub-devices particularly. Even with circumferentially stocked cooking, for example, with food supports, such as gratings, baking trays or fat pans, then a very extensive and bright illumination of the cooking chamber is possible.
  • a second heat sink of the second sub-device is arranged on the air shaft bottom. This also allows a corresponding cooling effect to be generated at a locally targeted inflow of air into the air guide device in the region of this second heat sink.
  • this second heat sink is designed as a bridge-like strip.
  • this configuration it can be selectively and in particular at Brückenab réellen or bridge pillars thermally and mechanically connected to the air shaft bottom, on the other hand, then the arrangement of other components of the lighting device can be provided under the raised bridge middle part, so that they can also be arranged very stable position or fixed position there.
  • This has particular significant advantages when the light source is a light emitting diode and in addition a light guide is provided as in the relationship, the relative position between these two components must be met very precisely in order to minimize light losses.
  • this positional fixation between the light guide and the light source, in particular the light emitting diode should also maintain the corresponding temperature fluctuations , This can be achieved in particular by the above-mentioned embodiment.
  • the light guide preferably forms rod-shaped. It preferably extends through a passage in the holder.
  • the light guide in particular integrally has a slip protection element, which is designed such that the optical waveguide partially has a cross-sectional shape which is greater than an internal dimension of the implementation of the holder for slipping through the light guide by performing at least in a spatial direction in the cross-sectional plane.
  • the bushing can be designed to be circumferentially closed in a circumferential direction about a longitudinal axis of the light guide. However, it may be formed circumferentially open and, for example, be designed as a clip or arm-like.
  • the lighting device comprises at least one ductile compensation element, which is arranged on the holder, and on which the anti-slip element is mechanically contacted in the assembled final state of the lighting device, in particular rests or sits on it.
  • the ductile compensation element By such a plurality of specific geometric and positional embodiments of the light guide, the holder and the additional ductile compensating element, an interaction of the elements is provided by which the light source and the light guide can be arranged positionally fixed relative to each other.
  • an improved coupling of the light of the light source allows in the light guide and then passed a larger proportion of light on the optical fiber and selectively and selectively radiated again.
  • the rod-shaped configuration of the light guide allows on the one hand in a very compact design a very space-saving arrangement and a corresponding installation.
  • this specific anti-slip element By means of this specific anti-slip element, unwanted axial slippage in the holder is then avoided, especially on such a rod-shaped and thus preferably completely rectilinear configuration of the light guide, on the other hand the lead completely surrounds the light guide at least in sections over its entire length and then already by this design improved mounting of the light guide is achieved. Due to the additional additional separate ductile compensation element, which is then also specifically positioned, a more precise compliance with the position of the light guide is permanently possible.
  • this compensating element Due to the ductility of this compensating element and thus the corresponding deformation property hereby also provided an element which favors a position fixation by this property, so that a full rich fit and a corresponding contact between the compensation element and the light guide is achieved on the one hand, and on the other hand due to the material property the compensating element with appropriate compression then a force acting against the compression direction of the light guide is affected, so that it is then held in this regard in the opposite direction.
  • This is particularly advantageous due to the correspondingly projecting anti-slip element in particular in direct contact with the compensating element. This, because due to the arrangement of the anti-slip element and the compensating element in the axial direction of the light guide then also a certain mesh or an axial Overlap is generated and the above interaction particularly stands out.
  • the anti-slip element is formed on a jacket wall of the light guide.
  • the anti-slip element is formed on a jacket wall at a distance from the two ends of the rod-shaped optical waveguide.
  • the compensation element has a Shore A hardness between 35 and 60, in particular between 38 and 42, and preferably 40.
  • This value specification of the hardness of this compensating element is especially advantageous in those conditions which it experiences when using a lighting appliance in the use of a cooking appliance.
  • Especially the relatively high temperature fluctuations occurring there during operation of the cooking appliance in comparison to a deactivated cooking appliance require a very robust component with regard to a permanently reliable function, which does not undesirably wear or become brittle in the context or which otherwise quickly becomes functionally impaired.
  • the compensation element is formed in a straight line strand-like or annular. These two specific shapes allow particularly advantageous mounting scenarios on the holder, so that they are on the one hand form specific very simple structure, on the other hand require little space and are easy to install. Furthermore, the compensating element serves as a seal to an air duct of the household appliance, so that in a suction region of the ventilation device of the household appliance no faulty air is sucked out of the switch room.
  • the holder is preferably only partially circumferential in the circumferential direction about a longitudinal axis of the light guide.
  • the compensating element comprises elastomer, in particular silicone, in particular completely made of silicone.
  • elastomer in particular silicone, in particular completely made of silicone.
  • the light source is arranged at a distance from the light guide by a spacer and the spacer is seated on the holder.
  • the light source on the spacer non-destructively insoluble, in particular glued, which assembly work is reduced and forgetting the spacer during assembly is excluded.
  • the light source is a light emitting diode. This is both very compact in design and very energy efficient operable.
  • the spacer is formed, at least on the surfaces facing the light source and the light guide, from a light-reflecting material.
  • a light-reflecting layer is applied to these surfaces. This is advantageous in that the light losses of the light emitted by the light source, which then can not be coupled into the light guide, can thus be minimized.
  • the spacer is formed like a bridge.
  • the mechanical connection and in particular the abutment of the spacer on other components can be improved, and the bridge-like shape can also be another part, for example, the light source, something quasi also extend into the spacer, so that this component, in particular the light source is also protected by the spacer accordingly.
  • the light source extends through an opening in a portion of the spacer, which extends between two lateral bridge ends or bridge abutments or Brückenab réellen, it is arranged laterally protected. Since, in such an embodiment, this bridge middle part is arranged such that a kind of hollow area arises quasi between the bridge piers, then the partial lining in or dipping of the component, in particular the light source, is particularly advantageous and corresponding protection is provided.
  • the light source is arranged directly on a heat sink, and thus no circuit carrier between the light source and the heat sink is arranged.
  • the light source is arranged on a circuit carrier and the circuit carrier is in thermal contact with a heat sink of the lighting device.
  • This embodiment is advantageous in that the heat generated during operation of the circuit substrate can be selectively dissipated and here, too, an undesirable increase in temperature, which in turn could have a negative effect on the functionality of the light source, is prevented.
  • the circuit carrier on the heat sink facing the underside has a heat conducting layer, which rests in the assembled state of the lighting device to the heat sink. This configuration improves the heat transfer and thus also the dissipation of the heat from the circuit carrier to the heat sink.
  • the heat-conducting layer is a graphite layer and thus has at least a proportion of graphite.
  • Such a layer can be made relatively thin in terms of improving the heat transfer and is still relatively hard and robust, so that the functionality is permanently maintained.
  • the heat conducting layer may also be a thermal paste or a thermal adhesive tape.
  • the heat sink is formed like a bridge.
  • the assembly of other components, in particular the cooking appliance facilitated and on the other hand created a quasi relatively thin in itself component, which, however, allows a corresponding heat dissipation effect.
  • this bridge-type structure of the heat sink an arrangement of already mentioned components of the lighting device can take place even in the area below a bridge middle part, so that here as well a very compact configuration is again achieved in the overall structure.
  • the heat sink is arranged on a base body, in particular screwed or clipped thereto, and pressed in the mounted end state of the circuit carrier through the heat sink on a first side against a spacer and the light guide through the compensating element on one of the first side opposite second side is pressed against the spacer.
  • This is particularly advantageous with regard to a corresponding "sandwich" -like construction and the force-specific counteracting principles in order to permanently achieve a position-fixed arrangement between the light source and the light guide. This is especially true when different environmental conditions, especially strong temperature fluctuations act on the components.
  • the heat sink is arranged floatingly mounted on a base body in the assembled final state. This also temperature-induced different expansions of the body can be taken into account and thereby a certain relative movement between said components are made possible. Thereby, the occurrence of undesirable tensile and stress forces on the optical fiber can be avoided and in the context of damage or even breakage of the optical fiber can be prevented, in particular, if it is formed of a glass or glassy material.
  • this floating mounting of the heat sink on the base body by screwing or clip connections, wherein for this purpose at least one hole in the heat sink or a hole in the body is in particular a slot, so that here a corresponding movement of the fastener, in particular the screw is possible.
  • a biasing element is arranged by this screw, which acts in the direction of the screw and thus in particular in the axial direction of the screw.
  • This biasing element may in particular be a spring, in particular a spiral spring.
  • bracing Other embodiments of a bracing are possible.
  • the biasing member may be carried out in addition to an axis oriented coaxially with the connecting element or fastener oriented longitudinal axis and otherwise.
  • this can also be achieved, for example, by arcuate arms, which are arranged on the connecting element, in particular integrated, wherein these arcuate arms elastically deformable or especially bendable. This bending takes place when the attachment of the connecting element takes place in the axial direction thereof and thereby the deformation of the arms occurs.
  • this connecting element has a silicone component, which is designed similar to a bellows or meandering perpendicular to the longitudinal axis of the connecting element.
  • the biasing element is also connected in particular each with the heat sink or is due to it.
  • the invention relates to a cooking appliance with at least one lighting device according to the invention or an advantageous embodiment thereof.
  • a cooking chamber of the cooking appliance is bounded by walls of a muffle and the lighting device is arranged in an upper region of an outside of a side wall of the muffle facing away from the cooking chamber.
  • the light source is arranged outside the cooking chamber, and the light guide extends over a passage in the side wall in the cooking chamber.
  • the light guide is suspended from above in the holder and is oriented substantially vertically.
  • the structure of the lighting device with the anti-slip element and the ductile compensation element is particularly effective with respect to the position fixation.
  • the cross-sectional shape of the light guide can be square or corner-free.
  • the physical configuration of the light guide can be, for example, a glass or a borosilicate glass or even plastic.
  • the formation of the anti-slip element with the specific area-wise cross-sectional shape of the light guide in the context of a nose-like bulge or an undercut, by a Material removal is generated, be formed.
  • this anti-slip element is dome-shaped in its shape, so that it is designed as possible corner-free and edge-free.
  • the undercut can also be created by deforming the glass rod of the light guide into a nail-head shape. In order to achieve an unambiguous positioning, in particular one side of the nail head shape is ground off and thus a mounting coding is formed.
  • a distance between the light source and a coupling end of the light guide, which faces the light source between 0.6 mm and 1.8 mm, in particular between 0.8 mm and 1.2 mm, preferably 1 mm ,
  • the spacer with the light source and in particular then the circuit carrier is non-destructively non-detachably connected, for example by an adhesive connection.
  • the heat sink is preferably made of a metallic material, which in particular has a thermal conductivity of greater than or equal to 200 W / mK.
  • the heat sink for example made of copper or aluminum, formed in an advantageous embodiment.
  • AL99.5 or AlMgSi 0.5 is preferably formed.
  • the cooking appliance is preferably also designed to carry out a pyrolysis operation in which, as is known, even higher temperatures occur than in a normal preparation operation for preparing food.
  • the base body on which the heat sink is preferably mounted in an advantageous embodiment, a component of a ventilation device of the cooking appliance.
  • the ventilation device preferably comprises an air shaft arranged above the muffle, into which a stream of air displaced by a fan is directed in a targeted manner. It may be provided in the context that the ventilation device is a single-shaft concept. It is preferably provided that the ventilation device has a two-shaft principle.
  • the air guiding device then comprises a suction shaft section into which the air flow through the Blower is sucked, and a pressure shaft section into which the air is expressed by the blower.
  • the air guiding device comprises a fan base plate or a ventilation shaft bottom, which is arranged above a top wall of the muffle. Also, a fan is preferably arranged above the muffle, wherein in addition also a fan base plate and the fan covering air duct cover is arranged. To form the two-shaft principle, further components can then be arranged between the fan base plate and the air shaft cover.
  • the second heat sink is arranged adjacent to a cooling air inlet of the air shaft bottom. Also, this local situation favors the cooling effect of the second heat sink significantly.
  • suction shaft section and the pressure shaft section are arranged one above the other at least in regions and are formed or fluidically separated by a partition wall between the air shaft bottom and the air shaft cover. It is thus almost a stacking of Saugschachtabitess and the pressure shaft section realized. As a result, a height-direction very compact design of the air guiding device can be achieved and the above-mentioned and explained two-shaft principle can be particularly favored.
  • the fan of the air guiding device is arranged in the air shaft between the pressure shaft section and the suction shaft section.
  • Fig. 1 is shown in a schematic representation of a cooking appliance 1, which is an oven, which preferably also has a pyrolysis function.
  • the cooking appliance 1 may additionally or instead also be a microwave cooking appliance and / or a steam cooking appliance.
  • the cooking appliance 1 can also have a hob with cooking zones, which in Fig. 1 are not shown in detail.
  • the cooking appliance 1 comprises a housing 2, in which a muffle 3 is arranged, which defines a cooking chamber 9 with two vertical side walls 4, 5, a ceiling wall 6, a rear wall 7 and a bottom wall 8. On the front side, the muffle 3 has a charging opening, which can be closed by a door 10. In terms of location and configuration, the cooking appliance also includes an operating device 11, which has a display unit 12 and operating elements 13 and 14.
  • FIG. 2 is a perspective view of a view of sub-components of the cooking device 1 is shown.
  • the muffle 3 is shown.
  • an air guiding device 15 is shown, which is arranged in the vertical direction (y-direction) above the muffle 3 and thus also above the ceiling wall 6.
  • a cooling air flow is generated, with which components, in particular also components of a lighting device 16, can be cooled.
  • the door 10 is cooled with a cooling air flow generated by the air guiding device 15.
  • the air guiding device 15 comprises one or more air ducts, which are formed by corresponding components, in particular a fan base plate or a duct bottom 25, an air duct cover 17 and an optional partition wall between the duct bottom 25 and the duct cover 17, whereby due to the arrangement of a blower 18 of the Air intake device 15 is a suction region formed by a suction channel or a Saugkanalabsacrificing and a pressure range by a pressure channel or pressure channel section and thereby a two-well principle or a two-channel principle is realized.
  • the lighting device 16 is designed to illuminate the cooking chamber 9. It is arranged in the embodiment outside of the cooking chamber 9 and viewed in the vertical direction in an upper region on an outer side 5a of the side wall 5 and it is constructed and arranged on the opposite side and thus on the side wall 4 accordingly a lighting device.
  • the lighting device 16 comprises at least a first sub-device 16a and at least a second sub-device 16b.
  • the sub-device 16b comprises a light guide 19, which is designed as a rectilinear rod.
  • the light guide 19 opens at a hole in a bulge 20 of the side wall 5 in the cooking chamber 9, so that he can radiate the light into the cooking chamber 9 in this regard.
  • the light guide 19 by a holder 21, which has a plate-like support 22 and a hollow body 23, held and secured to the bulge 20.
  • This holder 21 is preferably formed in a configuration of the cooking device 1 as Mikrowellengartrust preferably also as a microwave trap and made of an electrically conductive material. It is then also electrically connected to the bulge 20 in the context.
  • the second sub-device 16b further comprises a strip-shaped heat sink 24, which is shaped like a bridge.
  • the heat sink 24 is attached to the air shaft bottom 25 in the embodiment.
  • it is arranged to float in this case, which means that in the mounted end state, a defined relative movement, in particular in the horizontal plane and thus in the x-direction and z-direction is possible.
  • a relative movement is made possible.
  • this floating storage is preferably also achieved that no unwanted mechanical forces and stresses on the example of glass, plastic or borosilicate glass formed optical fiber 19 act, so that it does not break.
  • the attachment of the second sub-device 16b on the heat sink 24 is successful, in addition to bridge outlets or bridge pillars receptacles for connecting elements or fastening elements 26 and 27 are formed.
  • Fig. 3 To further explain the embodiment with the second sub-device 16b is on Fig. 3 to refer, in which an exploded view of the sub-components is shown.
  • the light guide 19 has in the context adjacent to its heat sink 24 facing the end 19a, which faces away from the opening into the cooking chamber 9 end, on its shell side 19b a slipping protection element 28. This is integrated and formed integrally with the material of the light guide 19. It is preferably designed so that it is designed as a corner-free dome or hood-like bulge on a side wall of the quadrangular in the embodiment of the rod. It is also located slightly spaced from the end 19a on the shell side.
  • the light guide 19 has a cross-sectional shape in some regions, which is greater than an inside dimension of the bushing 29 in order to prevent the light guide 19 from slipping through a lead-through 29 in a holder 30 at least in one spatial direction in the cross-sectional plane.
  • the holder 30 is designed so that it completely surrounds the light guide 19 circumferentially and the light guide 19 is inserted from above into the holder 30 and mounted.
  • the second sub-device 16b comprises a separate ductile compensation element 31, which is formed in the embodiment shown as a straight string-like and in cross-section corner-free element and preferably a silicone cord with a Shore A hardness between 38 and 60.
  • the holder 30 comprises a deposit area 32, in which the compensation element 31 is inserted and held. This position of the compensating element 31 is adjacent to the bushing 29, so that in the inserted end state of the optical fiber 19 in the holder 30, the anti-slip element 28 contacted directly with the compensating element 31 and rests on this or seated.
  • the second sub-device 16b includes a separate component to the other components in the form of a spacer 33, which is also formed in one piece and bridge-like.
  • the second sub-device 16b further comprises at least one light source 34, which is designed in particular as a light-emitting diode.
  • This light source 34 is arranged on a circuit carrier 35 or a circuit board.
  • a heat-conducting layer 36 On a rear side 35a facing away from the light source 34, a heat-conducting layer 36, in particular a graphite layer, is applied at least in regions, in particular over the whole area.
  • Fig. 3 in number and orientation as well as embodiment only as an example leads 37 for power supply and / or data exchange of the circuit substrate 35 with other electronic components, in particular a control unit provided.
  • the components of the second sub-device 16b are arranged in the region of a middle part 38 of the bridge-like heat sink 24 and positioned underneath between said bridge outflows or bridge pillars 39 and 40.
  • a compact construction and, to a certain extent, a construction of the further components of the lighting device 16 protected by the heat sink 24 can be achieved.
  • Fig. 4 is shown in a perspective sectional view of the assembled final state of the lighting device 16.
  • the light source 24 immersed in a receptacle 41 of the spacer 33 and is thereby both positionally held and fixed, on the other hand, arranged protected.
  • the spacer 33 is formed on its surfaces facing the light source 34 and / or the light guide 19 with a light-reflecting material, in particular with a reflective layer, this also contributes positively to the maximum light coupling into the light guide 19 of the light source 34th emitted light at.
  • the compensation element 31 compressed by the slip-through protection element 28 is also shown schematically.
  • the spacer 33 sits in the mounted end state on the holder 30, and by the bridge-like configuration is also a certain toothing or meshing in the vertical direction and thus also in the direction of the axis A of the light guide 19 given.
  • a slipping and Verkippoom or a security against rotation is further improved and increases the position fixation of the individual components.
  • the light source 34 in particular via the circuit substrate 35, non-destructively connected non-destructively with the spacer 33, in particular glued.
  • the light source 34 at a distance d, which is measured in the axial direction of the light guide 19, spaced from the light source 34 facing the end 19a of the light guide 19, wherein this distance d is preferably about 1 mm. That exactly this distance is then maintained, in addition to the positional retention of the position of the light guide 19 and the light source 34 to the other components is essential in order to achieve maximum light coupling and then light into the cooking chamber 9 can.
  • Fig. 5 is a partial view of a view of the components in Fig. 2 shown in the region of the heat sink 24.
  • the connecting elements 26 and 27 are additionally surrounded by prestressing elements 42 and 43 or coupled thereto, in which case the preloading elements are, for example, spiral springs oriented with their longitudinal axis parallel or coaxial to the longitudinal axis of the connecting elements 27 and 26.
  • the stiffness or ease of Relativverschiebungs mecanickeit between the heat sink 24 and the air shaft bottom 25 is set.
  • Fig. 6 is a sectional view of the view in Fig. 5 in the plane of the figure through the connecting element 27 and the heat sink 24 and the biasing member 42 shown.
  • a mounting position is shown, in which the connecting element 27 is arranged essentially centrally in a play-related hole 44 of the cooling body 24.
  • Fig. 7 In contrast, in a corresponding sectional view, a position shifted thereto is shown, in which case the connecting element 27 is seated off-center in the hole 44.
  • the biasing member 42 is supported on the one hand on a connecting element head 27a and on the other hand on a support plate 45 which is arranged on the heat sink 24 from.
  • This support plate 45 is also movable relative to the heat sink 24, as for example, in Fig. 7 in relation to the representation in Fig. 6 is shown.
  • Fig. 8 is a schematic sectional view of a further alternative embodiment for mounting and forming a floating mounting of the heat sink 24 to the base body, in particular the air shaft bottom 25 shown.
  • no spring element is designed as a biasing element, but here are in the axial direction of the longitudinal axis B of the connecting element 27, in particular adjacent or on the connecting element head 27 a movable bent arms 46 formed as a biasing member 42. These are supported on the heat sink 24 and deform during an axial movement of the connecting element 27th
  • a self-flexible and deformable biasing member 42 is formed, which is designed similar to a bellows and is connected to the connecting element 27.
  • it is connected to the heat sink 24, wherein it as shown in FIG Fig. 9 the edges bounding the hole 44 and engages both on a side facing away from the air shaft bottom 25 top 24 a of the heat sink 24 and on the air shaft bottom 25 facing bottom 24 b of the heat sink 24 and is contacted.
  • this biasing element 42 is thus also at least partially meander-shaped, and thus thus the relative displacement of the heat sink 24 to the air shaft bottom 25 in a plane perpendicular to the plane of the figure allows.
  • a further embodiment of a floating bearing is shown in a further schematic sectional view, in which case no biasing element 42 is formed and this can be provided in particular, although to a certain extent a relative movement and thus a game in the vertical direction of the plane of the figure and thus along the Axis B can be possible.
  • FIG. 11 shown schematic sectional view of the cooking appliance 1 is shown in an upper portion of the door 10.
  • the door 10 comprises a door outer panel 10a and at least one inner door panel 10b, which faces the cooking chamber 9 in the closed state of the door 10.
  • a handle 10c is disposed on an outer side of the door outer panel 10a.
  • At least one ventilation duct 10d is formed between the at least two disks 10a and 10b. Through this, a cooling air 10d is sucked by the fan 18 and directed from bottom to top. This occurs in the upper region of the door 10 from an upper door cover 10f, which is also commonly referred to as a top panel, from.
  • the muffle 3 comprises at the front and thus the door 10 facing a Muffelflansch 3a.
  • the muffle flange 3 a is in particular completely circumferential and thus formed like a frame.
  • an air shaft 48 of the air guiding device 15 is formed in the vertical direction and thus in the y-direction over the muffle 3 and thus also the ceiling wall.
  • the fan 18 is disposed at a rear end of the air duct 48 in an upwardly raised dome 47.
  • the air shaft 48 is arranged in particular such that this outlet opening 50 is arranged between an upper edge of the door 10 and a lower edge of the control panel 51.
  • the air duct 48 is not designed as a single air duct, as in Stander technique, but designed as a so-called double air duct.
  • the air duct 48 includes a suction passage portion and a suction passage portion 48 a, respectively, which extends in the flow direction from the door 10 to the blower 18.
  • the suction shaft section 48a is therefore formed by the part of the air shaft 48 formed upstream of the fan 18.
  • the air duct 48 further includes a pressure passage section 48b extending downstream of the blower 18 from the blower 18 to the outlet port 50.
  • This suction chute portion 48a and the pressure chute portion 48b are stacked in the y direction and arranged in parallel, with the suction chute portion 48a being formed below the pressure chute portion 48b.
  • the sections 48a and 48b are fluidically separated by the common horizontal partition 48c.
  • the blower 18 facing away from the end of the suction chute section 48a has an opening which is adjacent to an opening 10g, so that the air 10e from the door 10 in the suction chute section 48a by means of the blower 18 is sucked.
  • the air flow 53 sucked in by the fan 18 from the equipment compartment 49 is directed to the opening 50 via this pressure shaft section 48b. Due to the arrangement of the sections 48a and 48b and the blower 18 and in particular also its operating mode, the cooling air 10e is sucked from the section 48a to the blower 18 and then automatically picked up by the pushing air flow 52 and forwarded to the opening 50th
  • Fig. 12 is a plan view of the embodiment according to Fig. 2 shown. In this context, air flows are indicated schematically.
  • the position of the lighting device 16 is shown with their sub-devices 16a and 16b, in which case a first sub-device 16a, the illumination of the cooking chamber 9 is formed and arranged from above and thus on the top wall 6 ago.
  • the air flows 53 can be seen, which via the device chamber 49, which represents the switch room, and thus electronics for the operating device, which is to operate on the front panel 51, receives flow.
  • this first sub-device 16a comprises the plate-like heat sink 54 which is arranged on the air shaft cover 17.
  • this heat sink 54 comprises a plurality of air inlet holes 54a, via which the air stream 53 passes as cool air from the device chamber 49 into the pressure shaft section 48b or is sucked in.
  • this first sub-device 16a comprises at least one light source 55 in the form of a light-emitting diode, which is arranged on a circuit carrier which is connected to the heat sink 54.
  • the light source 55 extends completely within the printing-well section 48b. She is as in Fig. 11 can be seen, even arranged completely outside the cooking chamber 9.
  • a rod-shaped light guide 59 is arranged, which extends in the illustrated embodiment in the pressure shaft section 48b through the suction shaft section 48a to the cooking chamber 9 and irradiates the light of the light source 55 from above into the cooking chamber 9 via an opening in the top wall 6 ,
  • the Heatsink 54 includes a plurality of such inlets 54a, wherein in Fig. 2 however, for clarity, only a few are identified by the corresponding reference numeral 54a.
  • the respective local light source in the form of the at least one light-emitting diode is arranged completely outside the cooking chamber 9, and the respectively emitted light is irradiated into the cooking chamber 9 via the light guides 19 already shown and explained there.
  • Fig. 13 is a sectional perspective view of the embodiment according to a perspective sectional view Fig. 12 shown along the section line XIII-XIII.
  • the embedded or lowered arrangement of the plate or of the heat sink 54 is shown from above in the air duct cover 17.
  • the air flows are symbolically illustrated.
  • Fig. 13 as shown in Fig. 11 also shown the air flow 57 in the suction shaft section 48a.
  • Fig. 14 is in a further embodiment, a plan view analogous to the representation in Fig. 12 shown in this embodiment of the cooking appliance 1, this is formed with a microwave function and thus represents a Mikrowellengarêt.
  • a difference in the air guide device 15 is provided, in which case also the fan base plate or the air shaft bottom 25 is otherwise designed. How to do it in Fig. 14 can be seen, here is not the channel 56 is present, but it is quasi by this fan base plate or the duct floor 25 at the same time the top wall 6 of the muffle 3 is formed, so that here the top wall of the muffle 3 is integrated formed by the air shaft bottom 25.
  • the air duct 56, as in Fig. 12 is shown there when running in Fig. 14 and in Fig. 15 which is a perspective view of the top view Fig. 14 represents formed by the microwave housing. This is realized by the component 58 and in FIGS. 14 and 15 shown.
  • the air shaft bottom 25 is thus cooled by the air currents, and by the arrangement and configuration of the heat sink 24 and 54 is also achieved by convection cooling. Furthermore, heat is released from the heat sinks 24 and 54 to the air shaft bottom 25 and thus achieves a conductive effect.
  • a certain rib structure may additionally be formed on the heat sinks 24 and / or 54, thereby enlarging the surface around which it flows.
  • a thermal paste or a thermally conductive adhesive foil may alternatively be arranged there.
  • heat pipes can also be mounted on the heat sink. The heat transported away from a heat pipe can then be delivered in particular to the air shaft bottom 25 and / or the air duct and / or an intermediate rear wall and / or an intermediate floor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Claims (12)

  1. Appareil de cuisson (1) avec un espace de cuisson (9) limité par les parois (4 à 8) d'un moufle (3), et avec un dispositif de guidage d'air (15), lequel présente au moins un puits d'aération (48) pour l'amenée d'un flux d'air de refroidissement (53) à un dispositif d'éclairage (16) de l'appareil de cuisson (1) disposé afin d'éclairer l'espace de cuisson (9), dans lequel le puits d'aération (48) est disposé par-dessus le moufle (3) et le dispositif de guidage d'air (15) présente un fond de puits d'aération (25) et un couvercle de puits d'aération (17), le dispositif d'éclairage (16) présente au moins une source lumineuse (34, 55) disposée intégralement en dehors de l'espace de cuisson (9), contournée par le flux d'air de refroidissement (53), mené d'un espace d'appareil (49) constitué via le couvercle de puits d'aération (17) dans une section de puits sous pression (48b) du puits d'aération (48) observée dans le dispositif de guidage d'air (15) par rapport à une position technique d'écoulement d'un ventilateur (18), dans lequel le dispositif de guidage d'air (15) présente une section de puits d'aspiration (48a) distincte de l'espace d'appareil (49) et observée dans le dispositif de guidage d'air (15) par rapport à une position technique d'écoulement du ventilateur (18), dans lequel le dispositif d'éclairage (16) présente au moins un conduit de lumière (19, 59), à travers lequel la lumière émise par la source lumineuse (34, 55) peut être dirigée dans l'espace de cuisson (9), caractérisé en ce qu'un premier conduit de lumière (19, 59) s'étend en forme de bâton et, au moins en faisant saillie à travers la section de puits d'aspiration (48a), à travers un orifice dans le fond du puits d'aération (25), et dans lequel la source lumineuse (34, 55) est disposée à l'écart d'une extrémité (19a) du conduit de lumière (19, 59) en forme de bâton dirigée vers la source lumineuse (34, 55), selon un écartement (d) qui se mesure dans le sens axial du conduit de lumière (19, 59) en forme de bâton.
  2. Appareil de cuisson (1) selon la revendication 1, caractérisé en ce qu'un corps de refroidissement (24, 54) du dispositif d'éclairage (16) est couplé thermiquement au fond de puits d'aération (25) et/ou au couvercle de puits d'aération (17).
  3. Appareil de cuisson (1) selon la revendication 1 ou 2, caractérisé en ce que la source lumineuse (34, 55) est une diode électroluminescente.
  4. Appareil de cuisson (1) selon l'une des revendications précédentes, caractérisé en ce qu'au moins une source lumineuse (34, 55) s'étend à l'intérieur de la section de puits sous pression (48b).
  5. Appareil de cuisson (1) selon l'une des revendications précédentes, caractérisé en ce que le dispositif d'éclairage (16) présente un premier dispositif partiel (16a), exécuté afin de diffuser de la lumière dans l'espace de cuisson (9) à travers une paroi supérieure (6) du moufle (3), et un premier corps de refroidissement (54) du dispositif partiel (16a) est disposé sur le couvercle de puits d'aération (17) et présente au moins un orifice de passage d'air (54a) à travers lequel le flux d'air de refroidissement (53) peut être dirigé de l'espace d'appareil (49) dans la section de puits sous pression (48b).
  6. Appareil de cuisson (1) selon la revendication 5, caractérisé en ce que le premier corps de refroidissement (54) est une plaque.
  7. Appareil de cuisson (1) selon l'une des revendications 1 à 6, caractérisé en ce que le dispositif d'éclairage (16) présente un deuxième dispositif partiel (16b), exécuté afin de diffuser de la lumière dans l'espace de cuisson (9) à travers une paroi latérale (4, 5) du moufle (3), et en ce qu'un deuxième conduit de lumière (19) du deuxième dispositif partiel (16b) s'étend en dehors de l'espace de cuisson (9) et, dans une zone supérieure de la paroi latérale (4, 5) du moufle (3), dans un orifice de la paroi latérale (4, 5).
  8. Appareil de cuisson (1) selon la revendication 7, caractérisé en ce qu'un corps de refroidissement (24) du deuxième dispositif partiel (16b) est disposé sur le fond de puits d'aération (25).
  9. Appareil de cuisson (1) selon la revendication 8, caractérisé en ce que le deuxième corps de refroidissement (24) du dispositif d'éclairage (16) est exécuté sous forme d'une bande formant pont.
  10. Appareil de cuisson (1) selon la revendication 8 ou 9, caractérisé en ce que le corps de refroidissement (24) est disposé à proximité d'une entrée d'air de refroidissement (56a) d'un conduit à air (56) du fond de puits d'aération (25).
  11. Appareil de cuisson (1) selon l'une des revendications précédentes, caractérisé en ce que la section de puits d'aspiration (48a) et la section de puits sous pression (48b) sont au moins par endroits disposées une au-dessus de l'autre et séparées par une paroi de séparation (48c) entre le fond de puits d'aération (25) et le couvercle de puits d'aération (17) sur le plan de la technique d'écoulement.
  12. Appareil de cuisson (1) selon l'une des revendications précédentes, caractérisé en ce que le ventilateur (18) du dispositif de guidage d'air (15) est disposé dans le puits d'aération (48) entre la section de puits sous pression (48b) et la section de puits d'aspiration (48a).
EP15153968.1A 2014-02-27 2015-02-05 Appareil de cuisson doté d'un refroidissement spécifique d'un dispositif d'éclairage Active EP2913591B1 (fr)

Applications Claiming Priority (1)

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DE102014203531.7A DE102014203531A1 (de) 2014-02-27 2014-02-27 Gargerät mit einer spezifischen Kühlung einer Beleuchtungsvorrichtung

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EP2913591B1 true EP2913591B1 (fr) 2018-06-13

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TR201612442A2 (tr) * 2016-09-02 2018-03-21 Arcelik As Aydinlatma vasitasi i̇çeren bi̇r firin
KR101949581B1 (ko) 2017-03-13 2019-02-18 엘지전자 주식회사 조명장치 및 이를 구비하는 조리기기
DE102017220886A1 (de) 2017-11-22 2019-05-23 BSH Hausgeräte GmbH Backofen mit Sensoreinrichtung und Lüfter
WO2020043359A1 (fr) * 2018-08-31 2020-03-05 Arcelik Anonim Sirketi Dispositif de cuisson comprenant un élément d'éclairage
DE102022123917A1 (de) * 2022-09-19 2024-03-21 Bjb Gmbh & Co. Kg Leuchte, vornehmlich Hausgeräteleuchte, insbesondere Gargeräteleuchte

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DE102005003975A1 (de) * 2005-01-28 2006-08-03 Electrolux Home Products Corp. N.V. Gargerät
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