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
  • F24C15/02—Doors specially adapted for stoves or ranges
  • F24C15/04—Doors specially adapted for stoves or ranges with transparent panels
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
  • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
  • F21W2131/30—Lighting for domestic or personal use
  • F21W2131/307—Lighting for domestic or personal use for ovens

Definitions

• the invention relates to a cooking device with a cooking space and a lighting device for illuminating the cooking space, which has at least one reflector with at least one first reflector surface, which reflects the light of the lighting device as diffuse scattered light into the cooking space.
• the lighting device is integrated in an oven door and has curved reflectors which are elongated and have a parabolic cross section and are arranged at the height of the viewing window.
• Several reflectors are preferably assigned to the reflectors.
• the object of the invention is to provide a cooking device with a cooking space which is illuminated in an optically appealing manner.
• the reflector has at least one second transverse reflector surface which runs transversely to the first reflector surface and which bundles the light from the light source and reflects it into the cooking space.
• the second transverse reflector surface reflects the light of the lighting device in such a bundled manner into the cooking space that the food to be cooked on baking trays is optically highlighted.
• the first reflector surface reflects diffuse scattered light for uniform illumination of the cooking space. It is particularly preferred if the second reflector surface reflects the light in the form of a light cone into the cooking space, which widens in the direction of the food to be cooked. This ensures extensive and intensive lighting of the food.
• the beam path of the light reflected from the transverse reflector surface is directed almost parallel to the food to be cooked.
• the bundled light strikes a relatively small area of the baking sheet.
• the transverse reflector surface can be flat or curved in the direction of radiation.
• the cross reflector surface is oriented towards the cooking chamber like a curved mirror.
• one of the transverse reflector surfaces serves to deflect the light from the light source in the direction of further transverse reflector surfaces.
• the light source can be arranged spatially separate from the reflector. It is sufficient if the light source is only in optical connection with the deflecting transverse reflector surface in order to deflect the light onto the further transverse reflector surfaces.
• the first reflector surface can preferably be flat or convex in the direction of radiation.
• the first reflector surface achieves a particularly good light scattering effect, as a result of which all edge zones of the cooking space are adequately illuminated.
• the first and second reflector surfaces are formed in one piece with the reflector.
• the reflector can be made, for example, from a plastic injection-molded part, the reflector surface of which is mirrored.
• the various reflector surfaces are already aligned with one another during the manufacture of the reflector.
• the reflector material has a low coefficient of thermal expansion, since warping of the reflector in the event of thermal stress is thus reduced. This ensures a permanently optimal alignment of the first and second reflector surfaces with respect to one another.
• a particularly harmonious illumination of the cooking space results if a transition between the first and the second reflector surface is rounded. This ensures a constant transition of the light intensity between the focused light and the diffuse scattered light.
• the surface structure of the second reflector surface is roughened.
• the second cross-reflector surface therefore not only generates focused light, but also a small amount of diffuse scattered light. This also results in a constant transition of the light intensity between the concentrated light and the diffuse scattered light.
• the reflector is arranged in a cooking appliance door to close the cooking space. In this case, glare-free lighting of the cooking space is made possible because the reflector reflects the light of the light source into the cooking space in the user's direction of vision.
• the light source of the lighting device can advantageously be arranged outside the cooking device door and radiate light onto the reflector arranged inside the cooking device door. An arrangement of the light source that is spatially separate from the reflector can thus be carried out. In this case, vibration-sensitive lamps can also be used, since the light source is not exposed to vibrations when opening and closing the cooking appliance door.
• the first reflector surface of the reflector is curved in the shape of a groove.
• a U-shaped or parabolic groove shape of the first reflector surface is particularly advantageous here in order to obtain an optimal light distribution of the diffuse scattered light in the cooking space.
• the first reflector surface can advantageously delimit a light guiding space. The light from the light source collects in this and is reflected from there in the cooking space. Loss of light when the light is reflected on the reflector is thus reduced. It is advantageous if the transverse reflector surface is arranged within the light guide space and reflects the bundled light into the cooking space.
• the front ends of the channel-shaped, curved first can Reflector surface to be closed by transverse reflector surfaces. This gives the reflector an advantageous trough shape, which reduces light loss at its front ends.
• the reflector has a light channel that is opaque to the outside. Through the light channel, the light can be transmitted between spaced reflector surfaces without loss of light. The loss-free light transport in the reflector increases the light output.
• the light guiding space of the reflector is closed on the inside of the door. Loss of light in the door interior can thus be largely reduced. It is preferred if the reflector closes the light guiding space together with a door inner pane facing the cooking space.
• Figure 1 is a perspective view of a cooking appliance with the cooking appliance door open;
• Figure 2 is a side sectional view of a section of the cooking device
• Figure 3 is a perspective view of the cooking appliance door with a partially broken door inner pane
• Figures 4a to 4c a reflector arranged in the cooking appliance door in a view from above and from the side and in a perspective view;
• FIG. 5 is a front view of the cooking device without the cooking device door and in a partial section.
• 1 shows a cooking appliance with a cuboid cooking appliance muffle 3.
• the cooking device muffle 3 has a muffle opening 5 on the front.
• Horizontal insertion ribs 7 are formed on the two side walls of the cooking device muffle 3. These are used to insert and support baking trays in horizontal cooking space levels.
• the muffle opening 5 on the front can be closed via a front cooking appliance door 9. This . is pivoted via side door hinges 11 in the lower region of the cooking appliance.
• the muffle opening 5 is surrounded by a muffle flange 13 on the front.
• An annular seal 15 is attached to the muffle flange 13, which extends around the muffle opening 5 on the circumferential side.
• FIG. 2 shows the cooking appliance with the cooking appliance door 9 closed.
• the cooking appliance door 9 is in contact with the ring seal 15 with its inside facing the cooking chamber 1.
• the muffle flange 13 on the front is spaced apart from the cooking appliance door 9 by an intermediate space 16, which is approximately 7 mm.
• a heating element 17 is attached to an underside of a muffle base of the cooking appliance muffle 3, in which a bottom heating element 18 is held.
• the radiator housing 17 extends to close to the muffle flange 13 on the front.
• An oven lamp 21 is also arranged below the muffle base.
• the housing 22 is held in the front muffle flange 13. The light from the lamp 21 is reflected into the cooking space 1 via the cooking device door 9.
• the cooking appliance door 9 has a rectangular door frame 25 which runs on the circumference and is made from a deep-drawn sheet metal.
• a door handle 27 is fastened to an upper frame bar of the door frame 25.
• the cooking appliance door furthermore has a door inner pane 29 facing the cooking chamber 1 and a front door outer pane 31 which are spaced apart from one another.
• the inner door pane 29 is removably held on the door frame 25 by means of latching connections (not shown).
• the front outer pane 31, however, is firmly connected to the door frame 25.
• the two panes 29, 31 are made of a translucent glass ceramic material and have opaque prints 33.
• movable hinge parts 26 of the door hinges 11 can be seen, which are fastened within the door frame 25.
• the movable hinge parts 26 can be suspended in corresponding housing-side fixed hinge parts of the door hinge 11.
• FIG. 4a to 4c In the door interior 37 there are two elongated reflectors 39 as shown in FIG is dimensionally stable.
• One of the reflectors 39 is shown in FIGS. 4a to 4c. Accordingly, the reflector is almost U-shaped in cross section, so that it extends in a longitudinal direction trough-shaped.
• the reflector 39 has a flat channel floor 40 which is surrounded by raised longitudinal side walls 41. The channel floor 40 and the longitudinal side walls 41 delimit a light guiding space 49.
• the transverse reflector surfaces 42, 43, 44 which run transversely to the channel bottom 40 and to the longitudinal side walls 41, are arranged within the light guide space 49.
• the outer transverse reflector surfaces 43, 44 close the opposite narrow sides of the reflector 39.
• the upper free edges 45 of the outer transverse reflector surfaces 43, 44 and the longitudinal side walls 41 run flush at the same distance from the channel bottom 40. The flush course the upper edges 45 is interrupted by a gradation into which a cover described later can be inserted.
• Both the channel bottom 40, the longitudinal side walls 41 and the transverse reflector surface 44 are flat.
• the transverse reflector surfaces 42, 43 are curved in the form of a dome.
• assembly hooks 46 are formed, which are hooked into corresponding sections of the door frame 35, not shown, for holding the reflector 39.
• mounting lugs 47 are formed on the outside, which can be used for the optional mounting of a further middle door pane, not shown. Edge transitions 48 between the transverse reflector surfaces 42, 43, 44 and the longitudinal side walls 41 and the channel bottom 40 are rounded.
• the two reflectors 39 are arranged mirror-symmetrically to one another on the sides of the right-angled viewing window 34.
• the upper free edges 45 of the reflectors 39 are in contact with the inner door pane 29 or are only slightly spaced therefrom.
• the reflector 39, together with the door inner pane 29, delimits a light guiding space 49 which is essentially closed off on the door interior side.
• an additional sealing element for sealing light gaps can be provided between the free upper edge 45 of the reflector 39 and the door inner pane 29. A light emission from the light guiding space 49 into the door interior 37 is thus largely reduced.
• Additional translucent areas 51 are provided in the print 33 of the inner door pane 33, which project from the sides of the rectangular viewing window 34:
• the translucent areas 51 extend in the upper area of the viewing window and are aligned with the light-guiding space 46 of the reflectors 39. Light reflected by the reflector 39 can be reflected into the cooking space 1 through the translucent areas 51 of the inner door pane 29.
• circular optical windows 53 are formed in the lower area of the inner door pane 29, which are also translucent areas in the printing 33.
• the optical windows 53 are aligned with the transverse reflector surfaces 44 of the reflectors 39. Each light of the lamp 21 thus shines through the corresponding window 53 onto the opposite transverse reflector surface 44.
• the transverse reflector surface 44 is inclined relative to the channel bottom 40 in such a way that the incident light is introduced into the light guiding space 49, as is indicated in FIG. 2 ,
• a beam of light between the transverse reflector surfaces 42, 43, 44 runs essentially parallel to the longitudinal side walls 41 and to the channel bottom 40.
• Part of the light strikes the central transverse reflector surface 42 and is reflected from there as a cone of light K into the cooking space 1 .
• the central transverse reflector surface 42 is arranged in the light guiding space 49 below the upper edge 45 of the reflector 39. According to FIG. 2, this results in a light passage gap 54 between the central transverse reflector surface 42 and the door inner pane 29.
• a part of the Light forwarded to the downstream transverse reflector surface 43. This reflects the light as a further light cone K into the cooking space 1.
• the two transverse reflector surfaces 42, 43 are oriented in such a way that their light cones K radiate the cooking chamber 1 obliquely downwards.
• the reflectors 39 are completely mirrored on the inside. A smaller proportion of the light introduced into the light guiding space 49 of the reflector 39 is thus also reflected on the mirrored longitudinal side walls 40 and the channel bottom 41 in the cooking space 1 as a diffuse scattered light D (see FIG. 2).
• the longitudinal side walls 40 and the channel bottom 41 serve - in addition to the transverse reflector surfaces - as additional longitudinal reflector surfaces.
• the diffuse scattered light D is reflected into the cooking space 1 at any angle.
• the combination of the bundled light cones K with the diffuse scattered light D achieves the following: On the one hand, the food on the baking trays in the cooking space is visually highlighted by the light cones K. On the other hand, edge zones in the cooking space 1 are also adequately illuminated by the diffuse scattered light D.
• the low light intensity of the diffuse scattered light D continuously changes into the high light intensity of the light cone K.
• Such a constant transition of the light intensity is further improved if the transverse reflector surfaces 42, 43 are roughened. As a result, a small part of the light reflected into the cooking space by the second transverse reflector surfaces 42, 43 is reflected as diffuse scattered light.
• the open top of the reflectors 39 is covered in the area between the central transverse reflector surface 42 and the lower transverse reflector surface 44 by a cover 56 mirrored on the inside.
• a cover 56 mirrored on the inside.
• an opaque light channel 59 is formed in the reflector 39. This ensures that the light is guided from the lower transverse reflector surface 44 to the central transverse reflector surface 42 almost without loss of light.
• the cover 56 is arranged behind the printing 33 of the inner door pane 29 so that it is not visible.
• the cover 56 is arranged in a step recessed in the upper free edge 45 and ends flush with the upper free edge 45 of the reflector 39.
• the lamp 21 is arranged in the lamp housing 22 according to FIG. 2.
• the lamp housing 22 is of hollow cylindrical design and is oriented obliquely upwards at an angle of approximately 10 ° in order to increase the distance from the lower heat radiator 18.
• the lamp housing 22 is held in the front muffle flange 13 with an open end.
• the housing end held in the muffle flange 13 is surrounded by a frame-like light channel element 58.
• the light channel element 58 is placed on the front of the muffle flange 13. It thus protrudes into the space 16 between the muffle flange 13 and the door inner pane 29.
• the cooking space 1 together with the radiator housing 17 is surrounded by a heat insulation jacket 61.
• the heat insulation jacket 61 almost completely fills a housing space provided outside the cooking device muffle 3.
• a partition plate 63 is provided in the housing space in the area of the lamp 21.
• the partition plate 63 forms a hollow chamber 65 which is separated from the heat insulation jacket 61 and in which the lamp 21 is arranged.
• the partition plate 63 serves as an additional heat protection between the lamp 21 and the lower heat radiator 18.
• a stationary hinge part 67 of the door hinge 11 is provided in the hollow chamber 65.
• the hinge part 67 is usually made of a solid deep-drawn sheet and has a correspondingly large heat storage capacity.
• the lamp 21 is spaced only slightly over approximately 5 cm from the fixed hinge part 67 of the door hinge 11. Waste heat of the lamp 21, which arises due to operating conditions, can therefore be heat radiation indicated by arrows can be derived to the fixed hinge part 67. This reduces the operating temperature of the lamp 21 and increases its service life accordingly.
• the hollow chamber 65 can form part of an air duct 67.
• the air guide duct 67 has air inlet slots 69 on the housing bottom, through which air can enter the duct 67.
• the air duct 67 extends outside of the cooking device muffle 3 vertically up to a blower chamber provided above the cooking device muffle 3
• a known cooling-air blower arrangement 71 is provided in the blower chamber 69, which draws air from the blower chamber 69 in the direction of the arrow in order to cool electronic components of the cooking appliance.
• Ambient air is first sucked into the hollow chamber 65 on the bottom side. The sucked in

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Electric Stoves And Ranges (AREA)
• Control And Other Processes For Unpacking Of Materials (AREA)
• General Preparation And Processing Of Foods (AREA)
• Vending Machines For Individual Products (AREA)
• Electric Ovens (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=33154434

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (15)

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• 2003
  • 2003-04-25 DE DE10318860A patent/DE10318860A1/de not_active Withdrawn
• 2004
  • 2004-04-23 ES ES04729074T patent/ES2322997T3/es not_active Expired - Lifetime
  • 2004-04-23 US US10/553,255 patent/US20060266347A1/en not_active Abandoned
  • 2004-04-23 WO PCT/EP2004/004327 patent/WO2004097304A1/fr active Application Filing
  • 2004-04-23 AT AT04729074T patent/ATE426133T1/de not_active IP Right Cessation
  • 2004-04-23 DE DE502004009178T patent/DE502004009178D1/de not_active Expired - Lifetime
  • 2004-04-23 EP EP04729074A patent/EP1620680B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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