EP3290810B1 - Household devices luminaire - Google Patents

Description

The invention relates to a household appliance light for cooking appliances, such as ovens, microwave ovens or steamer, with an LED as a light source, with a provided for installation on a device wall luminaire housing, with a light exit opening in the luminaire housing, which is closed by a translucent cover, with a spacer, which is disposed between the LED and the light exit opening and is located in front of the light exit plane of the LED, with a reflection means, which forward the light emitted by the LED light of the cover.

Domestic appliance lights are known from the prior art in many forms. They are usually used to illuminate the interior of a household appliance during its operation or the insight of a user in such a recording room.

Whether it concerns home appliances for food storage (eg refrigerators) or home appliances for cooking food (eg ovens), certain requirements are made that are often difficult to reconcile. In principle, the illumination of the household appliance interior should allow a sufficient visual perception of the food by the user, which often causes problems due to shadowing, for example by shelves in refrigerators or trays in ovens due to shading. In addition, the lighting should basically not dazzle the user as possible, with the technical components used for this purpose bring light losses, which are disadvantageous.

The use of LEDs as light sources has led to new possibilities in the lighting of household appliances, while at the same time presenting the designers with new challenges.

In particular, in cooking appliances for food, such as ovens or steamer, great constructive efforts must be made to prevent overheating of the LEDs and a concomitant damage. For this purpose, not only the LED's own heat must be dissipated effectively. In addition, measures must be taken to minimize the temperature stresses on the LED caused by the cooking process.

The DE 10 2009 002 775 A1 should serve as an example of a cooking appliance lamp from the prior art. In per se usual way, this lamp is held in a housing cutout on a light housing. The light exit opening of the lamp housing is provided with a translucent cover, which protects the lamp interior primarily from contamination, but also already represents a first thermal barrier. The luminaire housing carries at its end facing away from the Gargeräteraum a cylindrical spacer element, wherein the cylinder jacket surface is surrounded by a reflection material. The cylinder cover surfaces are provided with translucent cover elements. On the one hand, this cylinder designed in this way serves to space the LED arranged at its end remote from the cooking chamber as far as possible from the cooking chamber and to minimize the heat load by means of this first measure. In addition, the cover elements form further temperature barriers. The cylinder itself also serves as a light well to guide the light emitted by the LED towards the cooking chamber. Finally, as a further measure, the LED is mounted on a heat sink, so that the heat of operation can also be dissipated via the heat barriers to LED residual heat.

It is also known from the prior art document which can not be assigned by hand to provide the cavity existing between the LED and the light exit opening of the inner wall of the cooking chamber with a light-permeable insulating material. Thus, the heat radiation originating from the cooking chamber is minimized and the illumination of the interior space is made possible.

In the prior art, the measures described here for spacing the LED from the cooking chamber and for heat shielding reduce the luminous efficiency and the illumination quality of the domestic appliance interior. In order to compensate for the diminished light yield, more powerful LEDs can be used, whereby their higher operating temperature is problematic.

WO2009 / 141068 A1 or EP 1598682 A2 use light guides to direct the light away from a cooking area in the oven into it. However, the highly directed radiation caused by this requires a large number of light exit openings and - depending on the technical implementation - a variety of light sources and light guides. In addition, the large number of point sources of light in the inner wall of the housing with its very high brightness is perceived as unpleasant, so that such solutions are reluctantly implemented for cost and comfort reasons.

Finally, for optimum illumination of the household appliance interior, especially in cooking appliances, several lights are arranged in the device side walls between the planes provided for supporting elements. Thus, each support element level in ovens, for example, each associated with a baking tray level associated with lighting, so that Shading by other support elements do not affect the illumination quality of each level.

Due to standardized external dimensions and the aim of keeping the usable interior of the cooking appliance as large as possible, the space available behind the lateral inner walls are extremely limited. This complicates the design of home appliance lighting for cooking appliances using LEDs, since the temperature protection serving distance between the oven and LED is limited.

In this respect, in particular when positioning a domestic appliance light behind the side wall of a cooking chamber, the light losses due to design in the prior art can not be readily compensated for by more powerful LEDs, since these generally produce a much higher operating heat.

The US 2015/0009705 A1 shows a so-called retrofit lamp, which is used to replace conventional discharge or incandescent lamps by LED lamps. The focus of the disclosure deals with various light-guiding elements, which receive the light emitted by an LED light, change the wavelength of the light and give it targeted again.

In the US 2012/0147624 A1 Also shown is a so-called retrofit lamp, which are intended for use in luminaires with conventional sockets such as E27. An LED sitting in the lamp base emits its light to a light guide, which leads the light into a reflector space. A scattering lens covering the light exit opening of the reflector space is provided with a reflective lens directly above the light guide end. As a result, the light leaving the light guide at its end becomes total reflection subjected to the reflector space and only passes through the reflector effect of the light exit opening of the reflector.

US 2016/0047966 A1 shows a household appliance lamp, in which the light emitted by an LED light is focused by a reflector and is then fed via a lens to a light guide. The light guide is embedded in a device wall and provided with structures for refraction. Through these structures, the light is deflected out of the light guide to illuminate a device interior.

US 2016/0131818 A1 discloses a lighting device for the floor nozzle of a vacuum cleaner. A guided parallel to the opening plane of the light exit openings optical fiber is provided with refractive structures, which provide for a light exit from the light exit openings. An LED feeds light into the light guide.

In US Pat. No. 6,350,041 B1 discloses a lamp that also uses an LED and a light guide. The light exit end of the light guide is shaped so that the highest possible light scattering is achieved. a large part of the light exit end leaving light is thrown onto a reflector and this in turn led to the light exit opening of a reflector space.

Finally shows EP 2 428 737 A1 a luminaire for lighting a hob. As a light source, a halogen lamp is used, which is arranged inclined in relation to the reflector. The inclination of the lamp results in an asymmetrically opening cone of light.

• das Abstandelement ein materialeinheitlicher Lichtleiter ist, welcher das Licht aufnimmt und bündelt,
• die gesamte Lichtaustrittsfläche des Lichtleiters relativ zu einer Mittelachse des Lichtleiters mit einer einheitlichen Neigung versehen ist und so die Kegelachse des aus der Lichtaustrittsfläche austretende Lichtkegels ebenfalls relativ zur Mittelachse des Lichtleiters geneigt ist
• das Reflektionsmittel ein Reflektor ist, welcher einen Reflektorraum aufspannt,
• der Lichtleiter in den Reflektorraum hineingeführt ist
• der Reflektor im Wesentlichen die aus dem Lichtleiter austretende Streustrahlung in Richtung Abdeckung lenkt.

The object of the invention, using an LED, to provide a compact household appliance light for cooking appliances, whose effectively usable for the interior lighting light output is maximized. The object of the invention is solved by a domestic appliance lamp with the features of claim 1, in particular with its characterizing features, according to which

• the spacer element is a material-uniform light guide, which receives the light and bundles,
• the entire light exit surface of the light guide is provided with a uniform inclination relative to a central axis of the light guide and so the cone axis of the emerging from the light exit surface light cone is also inclined relative to the central axis of the light guide
• the reflection means is a reflector which spans a reflector space,
• the light guide is guided into the reflector space
• the reflector essentially directs the scattered radiation emerging from the light guide in the direction of the cover.

The main advantage of the household appliance according to the invention is the fact that two different light-influencing components are used to maximize the light output. By means of the material-uniform light guide, for example one made of plastic or glass existing Lichtleitstabes, ie an existing light source of solid material, the light of the LED is recorded, bundled and brought with the lowest possible stray losses close to the light exit opening of the lamp housing, so close to the inner wall of the domestic appliance interior. In this case, the optical waveguide is at least partially in the reflector space, so that the scattered radiation emerging from the optical waveguide is received and also directed in the direction of the light exit opening of the luminaire housing, ie in the direction of the domestic appliance interior. At the same time, the light guide allows the widest possible spacing of the LED from the household appliance interior and serves for heat shielding. Also, the heat shield is the reflector, which reflects not only the scattered light, but also from the device interior entering heat radiation.

In order to produce a glare-free illumination of the device interior, the light exit surface of the light guide is inclined relative to a central axis of the light guide. As a result, the cone axis of the emerging from the light exit surface light cone is also inclined relative to the central axis of the light guide, wherein in the application, the light exit surface facing away from the user, that is inclined in the direction of, for example, the cooking chamber rear wall. Due to the inclined light exit surface of the emerging light cone is pivoted into the device interior, which is expressed by a corresponding inclination of the cone axis - which rises from the cone tip and extends through the center of the cone bottom - expresses. The conical surface of the emerging light cone is determined by the emission angle (equal to the half-value angle) of the light exit surface.

Essentially, the reflector serves to capture stray light which is otherwise applicable as loss radiation and does not arrive in the domestic appliance interior, which inevitably emerges from the lateral surface of the light guide.

It is furthermore provided that the reflector deflects the scattered light largely predominantly in the direction of the cone axis of the light cone emerging from the light exit surface of the light guide, so that a dazzling effect of the user caused by the reflected scattered light is largely avoided.

It is envisaged that the reflector has two web-shaped reflecting surfaces which emerge from a vertex axis, wherein the vertex axis is arranged near a light entry surface of the optical waveguide. This arrangement near the light entry surface of the light guide ensures that the scattered light emerging from the light guide in principle is absorbed by the reflector.

In particular, it is provided that the first, sheet-shaped reflection surface is curved about an axis of curvature parallel to the apex axis, wherein it can be provided that the area near the light entrance surface lies below a plane in which the marginal rays of the beam cone defined by the emission angle of the LED on the boundary surfaces of the light guide shell to meet.

This ensures that a maximum of scattered light is collected and reflected towards the home appliance interior.

It is further provided that the light guide is laterally offset to the apex axis of the reflection surfaces, wherein it can additionally be provided that the inclined light exit surface of the light guide in the direction of the lateral offset decreases. It is furthermore provided that the second sheet-shaped reflection surface is non-curved, in particular flat, and guided to the light entry area near the light entry surface and light guide surface, wherein the inclination of the second reflection surface with respect to the cone axis of the emerging from the light exit surface light cone substantially to the inefficiency of the second reflection surface leads.

The offset of the light guide to the apex axis, in particular an offset from the first reflection surface away causes a stronger scattered light output by the first reflection surface. In the above-mentioned corresponding inclination of the light exit surface emerging from the light exit surface direct light as well as the reflected back from the reflector scattered light is guided in approximately the same direction in the home appliance interior.

It is further provided that the second sheet-like reflection surface is not curved and is guided to the light entry surface near transition region of the light exit surface and light guide surface, wherein the inclination of the second reflection surface with respect to the cone axis of the light exit surface emerging light cone essentially leads to the inefficiency of the second reflection surface.

In this way, with appropriate mounting position of the lamp ensures that the light is guided exclusively substantially in the direction of the appliance appliance rear wall, in particular the cooking chamber rear wall of a cooking appliance.

It is further provided that the reflector and the immersion depth of the light guide are matched to one another in the reflector space in such a way that the reflector merely transmits the scattered radiation emerging from the light guide. but not reflected from the light exit surface emerging direct radiation.

Figur 1

die Explosionsansicht einer erfindungsgemäßen Leuchte,

Figur 2

eine Schnittansicht der Leuchte gemäß Figur 1,

Figur 3

eine schematische Darstellung der Abstrahlcharakteristik der Leuchte gemäß Figur 1 ohne den erfindungsgemäßen Reflektor an Hand einer Schnittdarstellung,

Figur 4

eine schematische Darstellung der Abstrahlcharakteristik der Leuchte gemäß Figur 1 unter Berücksichtigung des erfindungsgemäßen Reflektors,

Figur 5

ein Ofen mit erfindungsgemäßer Hausgeräteleuchte in perspektivischer Ansicht,

Figur 6

der Ofen gemäß Figur 5 in Ansicht von vorne,

Figur 7

eine Schnittdarstellung des Ofens gemäß Schnittlinie B-B in Figur 6,

Figur 8

eine Ausschnittvergrößerung gemäß Ausschnittskreis VII in Fig. 7.

Further advantages as well as a better understanding of the invention follow from the description of an embodiment. Show it:

FIG. 1

the exploded view of a lamp according to the invention,

FIG. 2

a sectional view of the lamp according to FIG. 1 .

FIG. 3

a schematic representation of the radiation characteristic of the lamp according to FIG. 1 without the reflector according to the invention with reference to a sectional view,

FIG. 4

a schematic representation of the radiation characteristic of the lamp according to FIG. 1 taking into account the reflector according to the invention,

FIG. 5

an oven with domestic appliance light according to the invention in a perspective view,

FIG. 6

the oven according to FIG. 5 in front view,

FIG. 7

a sectional view of the furnace according to section line BB in FIG. 6 .

FIG. 8

a detail enlargement according to section circle VII in Fig. 7 ,

In the figures, a household appliance light, also called just light, total provided with the reference numeral 10. The home appliance light includes, as out FIG. 1 it can be seen, first a heat sink 11 on which a board 12 with attached LED 13 (FIG. FIG. 2 ) is placed.

On the heat sink, a light housing 14 made of an electrically and thermally insulating material, such as plastic or ceramic, is arranged, within which a light guide 15 is held. In the present embodiment, it is a rod-shaped optical fiber made of glass. This has an LED near light entrance surface 16 ( FIG. 2 ) and a LED-distant light exit surface 17. The light exit surface 17 is inclined with respect to a central axis of the light guide 15. With respect to the board 12, it has a downward, to the board 12 facing slope. Incidentally, the light exit surface is kept flat.

The luminaire housing 14 has latching recesses 18, by means of which a latching spring 19 exhibiting reflector 20 is anchored to the lamp housing 14. The reflector 20 in turn forms an unspecified light exit opening of the lamp 10, which is closed by a translucent cover 21, in the embodiment, a glass pane 22. Finally, the reflector 20 has locking elements R, with which it is fixed in a section of a device wall.

In addition to the luminaire in the exemplary embodiment, connection conductor 23 also contacts printed conductors of circuit board 12 with their first ends in a manner not shown, and their ends facing away from circuit board 12 carry a connector 24 for connection to the power supply.

FIG. 2 shows the in FIG. 1 illustrated lamp 10 in a sectional view. This sectional view shows that the reflector 20 forms a first reflection surface 25 and a second reflection surface 26. These Reflection surfaces 25/26, together with the reflector side walls 27, the reflector space 29 and spring from a common apex axis 28. The reflection surfaces 25/26 are web-shaped, wherein the first reflection surface 25 about a curvature axis (not shown) is curved. The axis of curvature of the first reflection surface 25 lies parallel to the apex axis 28. The second reflection surface 26 forms an inclined surface projecting from the apex axis 28. The apex axis 28 lies on the lamp central axis LM, which extends through the center of the lamp housing base surface and through the center of the cover 21.

The light guide 15 extends into the reflector space 29 and is arranged with its longitudinal axis LA laterally offset from the light center axis LM. The light exit surface is inclined in the direction of offset downwards in the direction of board 12 and flat. With regard to the reflection surfaces 25 and 26, the light guide 15 is offset away from the first, curved reflection surface 25 in the direction of the second reflection surface 26.

As a result of this offset and the curvature of the first reflection surface 25 as well as the formation of the second reflection surface 26 as an inclined surface, the first reflection surface 25 strikes the light guide 15 near the light entrance surface. The second reflection surface 26, on the other hand, strikes the light guide 25. In the ideal case, the lowest point is in the direction of board 12 inclined light exit surface in the plane defined by the second reflection surface 26 plane. Due to this special design -the asymmetrically designed reflector 20 with its first, curved reflection surface 25 and its second, designed as an inclined surface reflection surface 26, the lateral offset of the light guide 15 to the lamp center axis LM and the inclined Light exit surface 16 - a special radiation characteristic of the household appliance lamp 10 is effected, which will be explained below.

FIG. 3 shows one of the FIG. 2 borrowed representation in which the reflector 20 and cover glass 22 has been omitted for clarity of the facts explained below. In the FIG. 3 shown dotted lines represent symbolically exemplary light rays emitted by the LED 13. First, in FIG. 3 D rays of light denoted by D emerge from the light exit surface 17 and are referred to as so-called direct light. This direct light D leaves the light exit surface 17 in a certain emission angle, which forms the opening angle of the light cone leaving the light exit surface 17.

Also shown are exemplary light beams S which, due to their angle of incidence, are reflected at the light exit surface 17, reflected back into the light guide 15 and exit from its lateral surface. These light rays designated S represent the so-called scattered light. FIG. 3 shows that this scattered light S instead of in the direction of the not shown, the light exit opening of the lamp 10 covering glass pane 22 are thrown back in the direction of the lamp housing 14. They are thus not available for illuminating the domestic appliance interior and can be described as loss radiation.

In FIG. 3 It can also be seen that the cone axis K shown in dotted lines of the light cone leaving the light guide 15 is tilted in the tilting direction due to the inclination of the light exit surface 17 from the vertical. As a result, the light leaving the light guide 15 is directed substantially away from the light center axis LM or light guide longitudinal axis LA.

FIG. 4 essentially corresponds FIG. 2 , where also dashed lines are shown here by way of example, which are for the LED 13 leaving light beams. Based on FIG. 4 can be explained very well the effect of the reflector.

As FIG. 4 can be seen, the scattered light rays S are taken from the first, curved reflection surface 25 and thrown in the direction of cover 21 and thus in the direction of the light exit opening of the lamp 10. The curvature of the reflection surface is dimensioned so that they throw the scattered light in the direction of offset of the light guide 15, ie substantially in the direction of the cone axis K. In this case, the first reflection surface 25 only receives the scattered light S for reflection, the direct light D emerging from the light guide 15 does not strike the first reflection surface 25 due to the arrangement of the light guide 15 within the reflection space 29.

Due to its position and inclination to the light guide 15, the second reflection surface 26 is inoperative and thus does not reflect any light. This is insofar relevant to the overall radiation characteristic of the luminaire 10 as the second reflection surface 26, provided that it would perform a reflective function which reflected light against the cone axis K.

How out FIG. 4 Finally, it can also be seen, the offset of the light guide 15 relative to the light center axis LM causes the direction in the first reflection surface 25 facing lateral surface maximizes and thus the utilization of the scattered light S is optimized taking into account the desired reflection direction to the cone axis K. That the light exit opening of the household appliance lamp 10 or the cover 21 leaving light forms a beam, which is also tilted in total in the offset direction of the light guide 15 and thus has a tendency.

Now, if the luminaire according to the invention is installed in a domestic appliance, in particular a cooking appliance, that the first reflection surface 25 points away from an interior opening, so this scatters the scattered light rays S in the domestic appliance interior and thus the cone axis K of the light exit surface 17 leaving light cone in the domestic appliance interior is directed, a dazzling effect of a user is effectively avoided.

In order to further optimize the luminous efficacy of the domestic appliance lamp 10, the fastening arms 30, which engage in light guide grooves 31 and hold the light guide 15 in the luminaire housing 14, are arranged in a region of the light guide 15 in which no light rays impinge due to the given LED radiation angle. This ensures that the light guide of the light guide 15 is not adversely affected.

FIG. 5 shows a household appliance in the form of a furnace 40. The oven comprises an outer housing wall 41 and an inside cooking chamber wall 42 which defines a cooking chamber 43. The cooking chamber 43 is accessible via an oven door 44, which is formed from an oven door frame 45 and an oven door glass 46, whereby through the furnace door glass 46 insight into the cooking chamber 43 can be taken. The cooking chamber wall 42 is provided with rails 47 which are arranged at different heights and carry food support 48 in the form of, for example, baking trays. Within housings 49 of the cooking chamber, domestic appliance lamps 10 according to the invention are mounted, the cooling bodies 11 of which are connected via recesses 50 of the housing wall 41 for heat release with the outside air. This oven is in FIG. 6 shown again in front view of the oven door 44.

In FIG. 7 the furnace 40 is cut along the section line BB in FIG FIG. 6 shown. In this respect, one sees in plan view the food support 48, which is seated on the rails 47. It is also clear that the Side walls are constructed bivalve and between the cooking chamber wall 42 and the housing wall 41, an insulating material 51 is arranged. Within a recess in the insulating material 51, the domestic appliance lamp 10 according to the invention is arranged, the heat sink 11 is directed towards the housing wall 41 and the cover 21 in the direction of cooking chamber 43. The cooking chamber rear wall 52, which delimits the cooking chamber towards the rear with respect to the oven door 44, is single-shelled in the present exemplary embodiment, but a two-shell structure is also suitable.

FIG. 8 is an enlarged detail according to section circle VII in FIG. 7 ,

This detail enlargement shows the lamp arranged in cooking chamber wall 42 in detail. The first reflection surface 25 as well as the light exit surface 17 point in the direction of the cooking chamber rear wall 52 and throw the light emitted by the LED 13 into the cooking chamber 43 such that the predominant portion of the emitted radiation is directed away from the oven door 44. In this way, by using the direct light D as well as the scattered light S and directed toward cooking back wall 52 Abstrahlcharakteristik the home appliance lights 10 a dazzling effect of the oven door glass 46 observing the cooking process user with optimal utilization of the emitted light to illuminate the oven 43 avoided.

In summary, the invention provides a home appliance lamp 10, which by a combination of light guide 15, a provided with asymmetric reflection surfaces 25 and 26 reflector 20 and finally by an offset of the light guide 15 to the lamp center axis LM has a special emission characteristic that allows glare-free illumination of a domestic appliance interior , In addition, the light output is by a desired Abstrahlcharakteristik supporting use of scattered radiation S of the light guide 15 significantly improved. The light guide 15 allows the spaced arrangement of the LED 13 from the domestic appliance interior, especially when it is a cooking chamber. In addition, the reflector 20 not only serves to reflect the scattered light radiation S but also to reflect the heat radiation emerging from a cooking chamber. In this way, the home appliance lamp 10 may be kept compact, so that it is also suitable for installation in home appliance side walls.

LIST OF REFERENCE NUMBERS

10

Hausgeräte light

11

heatsink

12

circuit board

13

LED

14

luminaire housing

15

optical fiber

16

Light entry surface

17

Light-emitting surface

18

recess

19

detent spring

20

reflector

21

cover

22

pane

23

connecting conductors

24

Connectors

25

first reflection surface

26

second reflection surface

27

Reflector sidewall

28

apex axis

29

reflector

30

mounting arms

31

Lichtleiternuten

40

oven

41

outer housing wall

42

cooking chamber

43

oven

44

oven door

45

Oven door frames

46

Oven door glass

47

rail

48

food support

49

neckline

50

recess

51

insulating material

52

cooking space

K

cone axis

R

locking element

S

scattered light

D

direct light

LM

Lights central axis

LA

Longitudinal axis of 15

Claims (10)

1. Domestic appliance lamp (10) for cooking appliances such as ovens, microwave ovens or steam cookers,

   - having an LED (13) as a light source,

   - having a lamp housing (14) provided for mounting on an appliance wall,

   - having a light exit opening (17) in the lamp housing (14) which is closed by a transparent cover (21),

   - having a spacer element which is disposed between the LED (13) and the light exit opening (17) and sits in front of the light exit plane of the LED (13),

   - having a reflection means which directs the light emitted by the LED (13) to the cover (21),

   characterised in that

   - the spacer element is a light conductor (15) made from a single material which receives and bundles the light,

   - the entire light exit surface (17) of the light conductor (15) is provided with a uniform inclination relative to a central axis (LA) of the light conductor (15) and the cone axis (K) of the light cone exiting the light exit surface (17) is therefore likewise inclined relative to the central axis (LA) of the light conductor (15),

   - the reflection means is a reflector (20) which spans a reflector chamber (29),

   - the light conductor (15) is run into the reflector chamber (29),

   - the reflector (20) substantially deflects the scatter radiation (S) exiting the light conductor (15) in the direction of the cover (21).
2. Domestic appliance lamp as claimed in claim 1, characterised in that the reflector (20) deflects the light very predominantly in the direction of the cone axis (K) of the light cone exiting the light exit surface (17) of the light conductor (15).
3. Domestic appliance lamp as claimed in one of the preceding claims, characterised in that the reflector (20) has two track-shaped reflection surfaces (25/26) originating from an apex axis (28), the apex axis (28) being disposed close to a light entry surface (16) of the light conductor (15) .
4. Domestic appliance lamp as claimed in claim 3, characterised in that the first track-shaped reflection surface (25) is curved about an axis of curvature parallel with the apex axis (28).
5. Domestic appliance lamp as claimed in claim 4, characterised in that the first curved reflection surface (25) is run to a region of the light conductor (15) close to the light entry surface.
6. Domestic appliance lamp as claimed in claim 5, characterised in that the region close to the light entry surface lies below a plane in which the peripheral beams of the beam cone defined by the irradiation angle of the LED (13) hit the boundary surfaces of the light conductor wall.
7. Domestic appliance lamp as claimed in claim 4, characterised in that the light conductor (15) is laterally offset from the apex axis (28) of the track-shaped reflection surfaces (25/26).
8. Domestic appliance lamp as claimed in claims 7 and 1, characterised in that the inclined light exit surface (17) of the light conductor (15) slopes downwards in the direction of the lateral offset.
9. Domestic appliance lamp as claimed in claims 8 and 4, characterised in that the second track-shaped reflection surface (26) is non-curved and runs to the transition region, close to the light entry surface, of the light exit surface (17) and light conductor wall surface, and the inclination of the second reflection surface (26) relative to the cone axis (K) of the light cone exiting the light exit surface (17) substantially renders the second reflection surface (26) ineffective.
10. Domestic appliance lamp as claimed in one of the preceding claims, characterised in that the reflector (20) and the depth to which the light conductor (15) extends into the reflector chamber (29) are adapted to one another so that the reflector (20) reflects only the scatter radiation (S) exiting the light conductor (15) but not direct radiation (D) exiting the light exit surface (17).

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