EP2318794A1 - Refrigerator with interior lighting - Google Patents
Refrigerator with interior lightingInfo
- Publication number
- EP2318794A1 EP2318794A1 EP09781600A EP09781600A EP2318794A1 EP 2318794 A1 EP2318794 A1 EP 2318794A1 EP 09781600 A EP09781600 A EP 09781600A EP 09781600 A EP09781600 A EP 09781600A EP 2318794 A1 EP2318794 A1 EP 2318794A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- interior
- appliance according
- refrigerating appliance
- 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.)
- Granted
Links
- 238000005057 refrigeration Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 5
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 5
- 238000005286 illumination Methods 0.000 abstract description 5
- 239000000835 fiber Substances 0.000 abstract 2
- 230000003287 optical effect Effects 0.000 description 9
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 239000013307 optical fiber Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D27/00—Lighting arrangements
Definitions
- the present invention relates to the interior lighting of a refrigerator, in particular a household refrigerator.
- Object of the present invention is to provide a refrigerator with interior lighting, which allows for a small number of bulbs in a small footprint uniform, well-distributed illumination of the interior.
- a refrigeration device with an interior lighting comprising at least one light source, a light guide for transmitting light from the light source into the interior along a wall of the interior extending transparent flat body and a plurality of the Body comprises distributed coupling-out structures.
- the coupling-out structures can be distributed on the flat body of the optical waveguide in accordance with the local light requirement in the interior and the intensity of the light flux in the optical waveguide, ie if the intensity of the light flux in the optical waveguide increases with increasing intensity Distance from the light source decreases, then this can be compensated by an increasing with the distance from the light source density of the coupling-out structures to ensure a uniform brightness distribution in the interior.
- the coupling-out structures can be recesses in a main surface of the light guide, at which light propagating substantially parallel to the main surface in the light guide is refracted and directed out of the light guide.
- recesses have the disadvantage that they cast shadows in the interior of the light guide, so that a decoupling point located behind them in the propagation direction of the light in the light guide only receives a low light output. Therefore, the decoupling points are preferably formed as localized projections on a substantially planar main surface of the light guide.
- the projection-shaped coupling-out points effect a light exit from the optical waveguide predominantly on a surface of the optical waveguide lying opposite them, they are preferably arranged on a main surface of the optical waveguide facing away from the interior.
- the planar areas of the main surface are polished. If the entire surface facing away from the interior of the light guide, including possibly attached to their decoupling points, polished, so this is useful to minimize the coupling of light on the remote from the interior main surface of the light guide.
- the light guide is preferably separated from the interior by a protective screen. If, in the course of using the refrigeration appliance, it bakes up by repeated cleaning, this, in contrast to a roughening of the light guide surface, essentially has no influence on the light distribution.
- An air gap between the light guide and the protective screen is useful to ensure efficient guidance of the light in the light guide by total reflection at its major surfaces.
- An end face of the light guide facing away from the light source may be mirrored in order to be coupled out without having been decoupled from light which has reached this end face. So this light is not lost unused.
- An incoupling portion of the light guide adjacent to the illuminant preferably has an elliptical or egg-shaped cross section in a first sectional plane. This cross-sectional shape is helpful for coupling the light of the light source efficiently into the light guide and, in particular, for coupling light which has been emitted from the light source at a relatively large angle to the propagation direction in the light guide into the light guide.
- the optical waveguide may have an arcuate or parabolic cross section in order to bundle the light emitted by the light source.
- Two light guides arranged next to one another on a wall of the interior allow a particularly uniform and shadow-free alignment of the interior.
- the two optical fibers can be connected to one another, preferably in one piece, by a transverse bar.
- the flat body serving as a light guide is U-shaped and consists in particular of polymethyl methacrylate (PMMA).
- PMMA polymethyl methacrylate
- the transverse bar and the coupling sections preferably merge into each other via a rounded or bevelled corner.
- the existing on the wall between the two light guides space can be used to lead there an air duct for the supply of the interior with cold air.
- the wall on which the light guide extends is preferably a vertical wall of the interior.
- the object is achieved by providing a light guide for the case of a refrigeration appliance having interior lighting which comprises at least one light source
- Transmission of light from the bulb into the interior extends along a vertical wall of the interior and that at least one further, from a
- Ceiling of the interior is provided by radiating bulbs. This furthermore
- Illuminant ensures that even objects that are in front of the bright surface of the light guide, on their side facing away from the light guide bright and easily visible.
- the light emitted by the vertical wall on the basis of the light guide is preferably at least approximately diffuse.
- the main radiation direction of the further illuminant is preferably oriented obliquely downward and on a rear wall of the interior.
- the further light source is designed as a punctiform light source, in particular as a light-emitting diode or as a light bulb.
- Figure 1 is a schematic section through the upper portion of the housing of a household refrigerating appliance according to the invention.
- Fig. 2 is an enlarged detail of Fig. 1;
- 3 shows a section through the light guide in the amount of a coupling-out structure, which illustrates the mode of operation of the coupling-out structure; 4 is a front view of the body of the refrigerator according to the invention.
- FIG 5 shows a section through the upper region of the light guides in a plane parallel to the rear wall of the refrigeration device.
- Fig. 1 shows a schematic section through the upper portion of a door 1 and a body 2 of a refrigerator. Under the ceiling 3 of the body 2 extends near the door a translucent cover 4, which covers several mounted on the ceiling 3 LEDs. The plane of the section passes through one of these LEDs 5. The LEDs are mounted so that their main beam direction, shown in FIG. 1 as a dotted line, obliquely downward and to the rear, on a rear wall 6 of the body 3 to.
- a fan housing 7 is attached to the ceiling 3.
- the cutting plane extends outside of the fan housing, so that a fan housed therein in the Fig. 1 is not visible.
- a large-area recess 8 of shallow depth is formed on the inside. It is covered in a small, upper area by an opaque cover 9 and in a larger, lower area of a transparent protective screen 10.
- a light-emitting diode 1 1 and a vertically elongated optical fiber 12 are housed in clear plastic such as PMMA, which are shown enlarged in Fig. 2.
- An upper adapter portion 13 of the light guide 12 has in the sectional plane of Fig. 1 and 2 an elliptical or egg-shaped cross-section. Shown is an egg-shaped cross section, which is composed of two semi-ellipses 14, 15 with different long semi-axes.
- the LED 11 is located approximately at the focal point of the upper half ellipse 14. The majority of the light output of the light emitting diode 1 1 reaches an elongated, flat plate-shaped lower portion 16 of the light guide 12 directly, without previously reflected on the surfaces of the adapter portion 13.
- Fig. 3 shows a section through a central portion of the section 16, along the same sectional plane as in Figs. 1 and 2. As shown in Fig. 3, a light beam propagates in the plate-shaped portion 16 of the light guide 12 by between its to
- Rear wall 6 parallel main surfaces 17, 18 is reflected back and forth until it meets a coupling-out structure 19.
- the angle ⁇ at which the jet impinges on the main surfaces 17, 18 is so great that total reflection takes place.
- the main surfaces 17, 18 are polished.
- a narrow air gap 23 separates the light guide from the protective pane 10
- the decoupling structure 19 is shown here as an approximately spherically curved projection on the main surface facing away from the interior of the refrigerator main surface 18, but numerous modifications of this form are conceivable.
- a beam entering such a coupling-out structure is largely reflected at its surface with its angle to the major surfaces changing so that it subsequently strikes the major surface 17 at a steeper angle and at least partially passes through it.
- the density of the coupling-out structures 17 at the light guide 12 increases from top to bottom, eg, as shown in the frontal view of FIG. 4, on the one hand the distance between the in horizontal rows arranged decoupling structures 19 decreases from top to bottom, on the other hand, by the number of coupling-out structures gradually increases in each row from top to bottom.
- Light reaching the lower end of the section 16 strikes a mirrored end surface 20 (see FIG. 2) where it is reflected back toward the light emitting diode 11. So it happens again the coupling-out structures 17, and again a large part of the light is decoupled into the interior.
- Fig. 4 shows two light guides 12, which extend side by side in the vertical direction on the rear wall 6. It could also be a single optical fiber or a larger number of optical fibers, on the rear wall 6 or distributed on the rear and side walls of the body 2, may be provided.
- the two light guides 12 of FIG. 4 are integrally connected to each other near their (in Figure 4 hidden) adapter sections 13 by a crossbar 21. Since the crossbar 21 also receives and emits light from the light-emitting diodes 1 1 attached to the upper ends of both light guides, no outcoupling structures are required in an upper region of the sections 16 and on the crossbar 21 in order to illuminate the interior near the ceiling satisfactorily, or at least the density of Auskoppel devisen much lower than at the lower end of the sections 16th
- Outlet openings 25 are distributed along the air channel 24 to supply each of several each separated by refrigerated goods 26 from each other compartments 27 of the interior with cold air.
- Fig. 5 shows an enlarged section through the upper portion of the portions 16 of the two optical fibers 12, the crossbar 21 and the adapter portions 13 in a to
- each adapter portion 13 is somewhat asymmetrical, and a corner 22 at which the Adapter portion 13 and the crossbar 21 adjacent to each other is bevelled or, as shown in Fig. 5, rounded.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL09781600T PL2318794T3 (en) | 2008-08-27 | 2009-08-07 | Refrigerator with interior lighting |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008041626A DE102008041626A1 (en) | 2008-08-27 | 2008-08-27 | Refrigeration appliance with interior lighting |
PCT/EP2009/060259 WO2010023086A1 (en) | 2008-08-27 | 2009-08-07 | Refrigerator with interior lighting |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2318794A1 true EP2318794A1 (en) | 2011-05-11 |
EP2318794B1 EP2318794B1 (en) | 2018-07-18 |
Family
ID=41323442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09781600.3A Active EP2318794B1 (en) | 2008-08-27 | 2009-08-07 | Refrigerator with interior lighting |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2318794B1 (en) |
DE (1) | DE102008041626A1 (en) |
PL (1) | PL2318794T3 (en) |
WO (1) | WO2010023086A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES1073240Y (en) | 2010-09-07 | 2011-03-03 | Bsh Electrodomesticos Epana S A | DOMESTIC DEVICE IN SPECIAL REFRIGERATOR APPARATUS WITH AN INDOOR LIGHTING SYSTEM |
DE102012015400A1 (en) * | 2012-05-15 | 2013-11-21 | Liebherr-Hausgeräte Lienz Gmbh | Cooling- or freezing device has component and one or multiple optical fibers integrated into component, where lamp is provided, by which light is fed into optical fibers |
DE102013005988A1 (en) | 2013-04-08 | 2014-10-09 | Emz-Hanauer Gmbh & Co. Kgaa | Electric home appliance with lighted interior |
DE102013218699A1 (en) * | 2013-09-18 | 2015-03-19 | BSH Bosch und Siemens Hausgeräte GmbH | Refrigerating appliance with a display unit |
DE102013225957A1 (en) * | 2013-12-13 | 2015-06-18 | BSH Hausgeräte GmbH | Lighting with a light guide and household refrigeration appliance with such lighting |
DE102015115575A1 (en) * | 2015-09-16 | 2017-03-16 | Miele & Cie. Kg | Light module for a household appliance, household appliance and method for producing a light module for a household appliance |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE934833C (en) | 1953-10-25 | 1955-11-03 | Delta Kuehlschrank G M B H | Lighting device for the interior of refrigerators |
JPH0798176A (en) * | 1993-09-30 | 1995-04-11 | Sharp Corp | Lighting device in refrigerator |
US5836669A (en) * | 1996-01-17 | 1998-11-17 | Troy Investments, Inc. | Remote illumination and light apportionment in appliances |
GB9620620D0 (en) | 1996-10-03 | 1996-11-20 | Ici Plc | Illumination system |
CN1186212A (en) * | 1996-11-08 | 1998-07-01 | 三星电子株式会社 | Lighting device for refrigerator |
JP2000258051A (en) | 1999-03-03 | 2000-09-22 | Sanyo Electric Co Ltd | Illuminating device of refrigerator or the like |
DE10336833A1 (en) | 2003-08-11 | 2005-03-17 | BSH Bosch und Siemens Hausgeräte GmbH | Refrigeration appliance with interior lighting |
JP2005344976A (en) | 2004-06-01 | 2005-12-15 | Toshiba Corp | Refrigerator |
JP4738281B2 (en) | 2006-08-18 | 2011-08-03 | 株式会社東芝 | refrigerator |
JP2008106975A (en) * | 2006-10-24 | 2008-05-08 | Toshiba Corp | Refrigerator |
-
2008
- 2008-08-27 DE DE102008041626A patent/DE102008041626A1/en not_active Withdrawn
-
2009
- 2009-08-07 WO PCT/EP2009/060259 patent/WO2010023086A1/en active Application Filing
- 2009-08-07 EP EP09781600.3A patent/EP2318794B1/en active Active
- 2009-08-07 PL PL09781600T patent/PL2318794T3/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2010023086A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102008041626A1 (en) | 2010-03-04 |
PL2318794T3 (en) | 2018-12-31 |
WO2010023086A1 (en) | 2010-03-04 |
EP2318794B1 (en) | 2018-07-18 |
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