Domestic refrigeration appliance having interior lighting device and method for production thereof

Abstract

The invention relates to a domestic refrigeration appliance and to a method for producing a domestic refrigeration appliance. The household refrigeration appliance comprises: an insulating body having an inner container delimiting a coolable inner space; the refrigeration equipment is used for cooling the internal space; the door leaf is used for closing the internal space; and an interior space illumination device that illuminates the interior space. The interior space comprises two side walls and a rear wall, and the interior space lighting device comprises an at least semi-transparent cover piece; a planar light conductor having a first surface facing the inner container and a second surface facing the cover; the lighting device couples light into the planar light conductor and then out of the second surface. The interior lighting device comprises a carrier plate whereby it is fixed on the rear wall on a surface on the interior container facing the interior, the carrier plate comprising a frame on which the cover is fixed. The first surface of the planar light conductor rests on the surface of the carrier plate facing away from the inner container, and the planar light conductor is clamped between the cover and the carrier plate.

Description

[0001] This application is a divisional application of the invention patent application filed on April 16, 2019, with application number 201910302926.9 and title "Household Refrigeration Appliance with Internal Space Lighting Device and Manufacturing Method Thereof". Technical Field

[0002] This invention relates to a household refrigeration appliance with an interior space lighting device and a method for manufacturing a household refrigeration appliance. Background Technology

[0003] Household refrigeration appliances typically include: an insulated body having an internal container defining a coolable interior space for storing food; a refrigeration device for cooling the coolable interior space; and an insulated door that closes the coolable interior space when closed and allows it to be accessed when open. The household refrigeration appliance may also include an interior space lighting device that illuminates at least partially the coolable interior space when the door is open.

[0004] US 7,736,010 B2 discloses a rear wall lighting device for a refrigerated appliance, the rear wall lighting device having an abdeckung for an air passage arranged on a rear wall, the air passage having an air outlet. The abdeckung has areas open towards the refrigerated interior space. LEDs are located on the side surfaces of these open areas, and these LEDs backlight the transparent abdeckung of the exposed areas.

[0005] DE 2014 209 141 A1 discloses a household refrigeration appliance with a planar interior space lighting device fixed in a pouch-like recess in the rear wall of a coolable interior space. The pouch-like recess can be implemented as a rear-mounted component. The interior space lighting device includes an LED and a planar light conductor coupled to the LED, such that light coupled into the light conductor radiates planarly from one of the surfaces of the light conductor. The interior space lighting device includes a cover for covering the light conductor. A 3D effect film is disposed between the cover and the light conductor. Summary of the Invention

[0007] The objective of this invention is to provide an alternative planar interior space lighting device for household refrigeration appliances.

[0008] The objective of this invention is achieved by a household refrigeration appliance comprising: an insulated body having an inner container defining a refrigerable interior space for storing food; a refrigeration device for cooling the refrigerated interior space; a door for closing the refrigerated interior space; and an interior space lighting device for at least partially illuminating the refrigerated interior space, wherein the refrigerated interior space includes two side walls and a rear wall, the surfaces of these side walls and the rear wall facing the refrigerated interior space being formed by the inner container, and the interior space lighting device includes: at least a translucent cover; and a... A planar light conductor has a first surface facing an inner container and a second surface facing a cover; and at least one lighting device that couples its light into the planar light conductor, thereby enabling the planar light conductor to couple light out from its second surface, wherein the interior space lighting device has a support plate, the interior space lighting device being fixed to the rear wall of the inner container on the surface facing the coolable interior space by means of the support plate, and the support plate includes a frame on which the cover is fixed, and the planar light conductor rests with its first surface against the surface of the support plate opposite to the inner container, thereby clamping the planar light conductor between the cover and the support plate.

[0009] Another aspect of the present invention relates to a method for manufacturing a household refrigeration appliance according to the present invention, the method comprising the following steps: - A planar optical conductor is arranged on a carrier plate, such that the planar optical conductor rests with its first surface against the surface of the carrier plate opposite to the inner container. - Secure the cover to the edge of the carrier plate, thereby clamping the planar optical conductor between the cover and the carrier plate, and - The interior lighting fixture is fixed to the rear wall, thereby fixing the support plate to the surface of the interior container facing the coolable interior space.

[0010] Therefore, household refrigeration appliances include an insulated body with an internal container. The insulated body particularly includes insulating foam as insulation. The coolable interior space includes two side walls and a rear wall, wherein the surfaces of the side walls and the rear wall facing the coolable interior space constitute the internal container.

[0011] A household refrigeration appliance includes a door that, when closed, seals the coolable interior space and, when open, allows access to it. The coolable interior space is configured for storing food. At least one door shelf may be fixed to the surface facing the coolable interior space.

[0012] The coolable interior space is cooled by means of a refrigeration device. The refrigeration device is preferably configured as a refrigerant circuit known in principle to those skilled in the art, and is preferably implemented such that the refrigeration device cools the coolable interior space to at least approximately a predetermined temperature. Household refrigeration appliances may include electronic control devices that regulate or adjust the refrigeration device in a manner known in principle to those skilled in the art.

[0013] A household refrigeration appliance includes an interior space lighting device configured to at least partially illuminate the coolable interior space, at least when the door is open. To identify the open state of the door, the household refrigeration appliance may include suitable door opening detection devices known in principle to those skilled in the art.

[0014] The household refrigeration appliance according to the invention can be, for example, a household refrigerator. In this case, the coolable interior space is cooled to a temperature greater than 0°C. However, the household refrigeration appliance according to the invention can also be a combination of freezing and refrigeration. The household refrigeration appliance according to the invention can have exactly one coolable interior space, but it can also have multiple coolable interior spaces, which can be closed and opened by means of a door.

[0015] The household refrigeration appliance according to the invention can also be configured as a wine cabinet, which is provided for storing bottles filled with drinkable liquids (especially wine). In this case, the door preferably does not include a door shelf and is preferably at least partially translucent, in that the door is, for example, at least partially made of glass. In this case, it can be provided that the interior space lighting device illuminates the coolable interior space even when the door is closed.

[0016] The interior space lighting device includes a planar light conductor, which is particularly made of a light-transparent material such as PMMA (polymethyl methacrylate) or polycarbonate, and the interior space lighting device includes a cover over the light conductor. The cover is, in particular, a diffuser. The planar light conductor includes two surfaces (i.e., a first surface and a second surface). The second surface faces the cover. Preferably, the cover rests against the second surface.

[0017] The second surface of the planar optical conductor can be structured or have a coupling structure. The coupling structure may include, for example, multiple grooves or cuts and / or scatterers, which are applied to the second surface of the optical conductor.

[0018] The interior lighting fixture includes at least one lighting device, which preferably includes one or more LEDs (e.g., arranged side by side). These LEDs are preferably mounted on a circuit board, which is connected to cables to supply power to these LEDs.

[0019] The at least one lighting device is coupled to the planar light conductor in such a way that the at least one lighting device can couple its light into the light conductor.

[0020] Preferably, the lighting device is arranged such that it laterally couples its light into the planar light conductor.

[0021] The light conductor is able to at least partially couple the light into its second surface so that the light can pass through the cover to illuminate the light.

[0022] The interior lighting fixture includes a support plate, preferably made of plastic. The support plate includes a frame to which a cover is fixed. A planar light conductor rests with its first surface against the surface of the support plate opposite to the interior container, thereby clamping the planar light conductor between the cover and the support plate.

[0023] Therefore, it is feasible to: firstly, manufacture the interior space lighting fixtures separately and independently, and then fix them as a whole to the rear wall of the relevant area of ​​the interior container. However, it is also feasible to: first fix the support plate to the rear wall, then arrange the light conductor in the support plate, and then fix the cover to the frame of the support plate.

[0024] The support plate is fixed to the rear wall of the coolable interior space on the surface of the inner container facing the coolable interior space. For this purpose, the support plate includes (e.g., integrally formed) a fixing device. The fixing device is preferably a locking device (e.g., at least one locking hook).

[0025] Therefore, preferably, the support plate includes at least one locking device, and the inner container includes a mating locking device, which engages with the mating locking device to secure the support plate to the surface of the inner container facing the coolable interior space. The mating locking device is, for example, a corresponding opening in the rear wall region of the inner container.

[0026] The interior space lighting device (or its planar light conductor) is preferably sized such that it covers the entire rear wall (but at least most of the rear wall).

[0027] Alternatively or additionally, the support plate may be screwed to the rear wall (or the corresponding area of ​​the internal container) by means of at least one screw. The screw head may be covered with an abdeckkappe.

[0028] Therefore, in order to fix the interior space lighting device to the rear wall, the method according to the invention can lock the support plate to the rear wall by means of a locking device and a cooperating locking device, thereby fixing the support plate to the surface of the interior container facing the coolable interior space.

[0029] The interior lighting device may have a first circuit board with a plurality of LEDs arranged side-by-side as lighting devices. In this case, the carrier plate may include a first channel in which the first circuit board and its LEDs are arranged. The first channel is arranged on the carrier plate in such a way that the LEDs of the first circuit board can couple their light into a first side of a light conductor (that is, to couple their light laterally into a planar light conductor). The first channel preferably extends vertically.

[0030] Preferably, the interior lighting device may additionally include a second circuit board having a plurality of LEDs arranged side-by-side. In this case, the carrier plate may include a second channel in which the second circuit board, along with its LEDs, is arranged. The second channel is arranged on the carrier plate such that the LEDs of the second circuit board can couple their light into a second side of the light conductor (that is, so that their light can also be coupled laterally into the planar light conductor). The second side is opposite to the first side.

[0031] In order to install this interior space lighting device, the first circuit board, together with its LEDs, is arranged (or fixed) in the first channel, especially before the cover and frame are fixed, and if necessary, the second circuit board, together with its LEDs, can be arranged (or fixed) in the second channel before the cover and frame are fixed.

[0032] The first circuit board can be connected to a cable for at least indirectly connecting the LEDs on the first circuit board.

[0033] The first passage can be bounded at one end by the wall of the support plate and is open at the other end.

[0034] The cable can be guided through the open end of the first channel.

[0035] Interior lighting fixtures may include a sealing plug that closes the open end of the first channel.

[0036] The second circuit board can be connected to a cable for at least indirectly energizing the LEDs on the second circuit board.

[0037] The second channel can be bounded at one end by the wall of the support plate and is open at the other end.

[0038] The cable can be guided through the open end of the second channel.

[0039] The interior lighting fixture may include an additional sealing plug that closes the open end of the second channel.

[0040] Preferably, the cover includes a semi-transparent area and a region that surrounds the semi-transparent area, through which light coupled by the planar light conductor can at least partially pass, while the surrounding region is impermeable to light, and this surrounding region extends to the edge of the cover and completely covers the LEDs of the first circuit board (and, if necessary, the LEDs of the second circuit board).

[0041] Areas of the cover that are not permeable to light are preferably achieved by printing, especially by white blocking printing.

[0042] Preferably, the cover is fixed to the frame of the support plate by means of an adhesive. The adhesive is particularly waterproof.

[0043] To better secure the cover to the frame, preferably, the frame may include at least one first channel in which adhesive is disposed for securing the cover to the frame. Preferably, the first channel is arranged circumferentially on the frame.

[0044] Therefore, in order to secure the cover to the frame, it is preferable to apply adhesive to the first channel and then press the cover against the frame until the adhesive hardens and thus secures the cover to the frame.

[0045] Preferably, the frame includes at least one second channel configured to receive excess adhesive, which is pressed from the first channel into the second channel during the securing of the cover to the frame. Preferably, the second channel extends circumferentially on the frame. The second channel may be implemented smaller than the first channel.

[0046] During the process of securing the cover to the frame using adhesive, it is preferable to press the cover against the frame. This may result in the adhesive disposed in the first channel not being fully received by the first channel and being pressed out as excess adhesive. To prevent this excess adhesive from flowing uncontrollably, it is preferable to provide a second channel that receives this excess adhesive.

[0047] Therefore, it is preferable to fix the cover to the frame of the support plate based on the following method steps: - Place the adhesive into at least the first channel. - Press the cover against the frame to adhere it to the frame for fixation, especially for an extended period of time, until the adhesive has completely hardened, and - Excess adhesive is received by means of a second channel, during which the excess adhesive is pressed from the first channel into the second channel while the cover is being secured to the frame.

[0048] The household refrigeration appliance according to the invention may have at least one folding bottom arranged in the coolable interior space for placing food.

[0049] According to an embodiment of a household refrigeration appliance of the present invention, the appliance includes a retaining device fixed to the rear wall for securing at least one compartment bottom. Thus, the support plate, the light conductor, and the cover each include corresponding openings through which the retaining device extends.

[0050] Preferably, the support plate includes a hochgezogene Wand in the area of ​​its opening, the hochgezogene Wand having an edge on which the cover rests. In particular, the cover is fixed to the edge by means of an adhesive, preferably the cover is adhesively resting on the edge by means of an adhesive.

[0051] The household refrigeration appliance according to the invention may have an air passage extending at least partially inside the rear wall and coupled to the refrigeration unit, the air passage terminating at a passage opening in the coolable interior space. This allows air cooled by the refrigeration unit to reach the coolable interior space via the air passage and the passage opening. Preferably, a forced convection device, for example in the form of a fan, may be provided to force the cooled air into the coolable interior space.

[0052] The support plate, the light conductor, and the cover preferably each have additional openings corresponding to the channel openings, so that air cooled by the refrigeration equipment can reach the coolable interior space via the air channel, via its channel openings, and via the additional openings.

[0053] Preferably, the support plate includes a lifting wall in the area of ​​its additional opening, the lifting wall having an edge on which the cover rests. In particular, the cover is fixed to the edge by means of an adhesive, and the cover is preferably adhesively resting on the edge by means of an adhesive.

[0054] With the help of an interior space lighting device, depending on the implementation method, the insertable rear wall can be illuminated, and the configuration of the illuminated rear wall can be realized.

[0055] In the case of household refrigeration appliances, especially floor-standing appliances, this interior space lighting device particularly illuminates the rear wall, serving as an emotionally resonant light for the interior area (i.e., the refrigerated interior space). Depending on the implementation, the illuminated rear wall (or interior space lighting device) includes, for example, the following components: The preferred material is a support plate made of plastic; Especially planar optical conductors in the form of optical conductor plates; Preferably, two circuit boards (or printed circuit boards) are used: these circuit boards (or printed circuit boards) are equipped with LEDs and connected to cables (or wires). The cables (or wires) are soldered to these circuit boards.

[0056] If necessary, use a plug that connects to the cable.

[0057] It is preferable to use an adhesive that has a particularly waterproof property.

[0058] The cover is preferably in the form of a printed diffuser plate, which has a blocking print.

[0059] If necessary, two sealing plugs and a cover can be used. Attached Figure Description

[0060] Embodiments of the invention are illustrated exemplary in the accompanying schematic drawings. The drawings show: Figure 1 A household refrigeration appliance with an interior lighting system is shown in a three-dimensional illustration. Figure 2 Showing a front view of the interior lighting fixtures, Figure 3 An exploded view of the interior lighting fixtures is shown. Figure 4 A cross-section showing a portion of the interior space lighting fixtures. Figure 5 , 6 Showing the support plate of the interior space lighting device, Figure 7 , 8 A rear view showing a portion of the interior space lighting fixtures, and Figure 9 This shows a section of the interior space lighting fixture after the cover has been removed. Detailed Implementation

[0061] Figure 1 A household refrigeration appliance 1 is shown in a perspective view. The appliance 1 includes an insulated body 2 with an inner container 3 defining a coolable internal space 4. The coolable internal space 4 is provided for storing food (not shown). As is known in principle to those skilled in the art, the insulated body 2 includes an insulating portion in the form of insulating foam (not shown in detail), on which the inner container 3 rests.

[0062] The coolable interior space 4 includes two side walls 4a and a rear wall 4b, the surfaces of the side walls 4a and the rear wall 4b facing the coolable interior space 4 being formed by an internal container 3.

[0063] The household refrigeration appliance 1 includes a door 5, which is pivotally supported on the body 2, particularly with reference to a vertically extending axis. When the door 5 is open, the coolable interior space 4 is accessible, and when the door 5 is closed, the coolable interior space 4 is sealed.

[0064] In the current embodiment, a plurality of door shelves 6 for storing food are arranged on the surface of the door 5 facing the direction of the refrigerated interior space 4. A plurality of food storage compartments 7 are arranged in particular within the refrigerated interior space 4, and drawers 8 are arranged in particular in the lower region of the refrigerated interior space 4, in which food can also be stored. One of these compartments 7 is arranged above the drawer 8, and this compartment covers the upward-facing opening of the drawer 8.

[0065] In the present embodiment, the household refrigeration appliance 1 includes a retaining device 12 fixed to the rear wall 4b for securing the grid bottoms 6.

[0066] The household refrigeration appliance 1 includes a refrigeration device 9, which is known in principle to those skilled in the art and is preferably in the form of a refrigerant circuit, for cooling the coolable interior space 4.

[0067] In the present embodiment, the household refrigeration appliance 1 includes an electronic control device 10 configured to regulate the refrigeration equipment 9 (particularly the compressor of the refrigerant circuit) in a manner generally known to those skilled in the art, such that the coolable interior space 4 at least substantially has a predetermined or pre-given rated temperature. The electronic control device 10 is preferably configured to regulate the temperature of the coolable interior space 4. To obtain the actual temperature of the coolable interior space 4 if necessary, the household refrigeration appliance 1 may have at least one temperature sensor (not shown in detail) connected to the electronic control device 10.

[0068] In the present embodiment, the household refrigeration appliance 1 includes an air passage extending at least partially inside the rear wall 4b and coupled to the refrigeration unit 9, the air passage terminating in the coolable interior space 4 with passage openings 11 (in the present embodiment, six passage openings 11). This allows air cooled by the refrigeration unit 9 to reach the coolable interior space 4 via the air passage and these passage openings 11. Preferably, a forced convection device, not shown in detail, such as a fan, may be provided to force the cooled air into the coolable interior space 4.

[0069] The household refrigeration appliance 1 includes a planar interior space lighting device 20 fixed to the rear wall 4b, which in particular largely covers the rear wall 4b. The interior space lighting device 20 is fixed to the surface of the inner container 3 facing the coolable interior space 4.

[0070] The interior space lighting device 20 is configured to at least partially illuminate the coolable interior space 4 when the door 5 is open. To identify the open state of the door 5, the household refrigeration appliance 1 may include suitable door opening recognition devices known in principle to those skilled in the art.

[0071] Figure 2 A front view of the interior space lighting device 20 is shown. Figure 3 The exploded diagram is shown. Figure 4 A cross-section of a portion of the interior space lighting fixture 20 is shown.

[0072] The interior space lighting device 20 includes a cover 21 that is at least translucent to light and a planar light conductor 22 (light conductor plate). The planar light conductor 22 is made of PMMA (polymethyl methacrylate) or polycarbonate.

[0073] In addition, the interior space lighting device 20 includes Figure 5 and Figure 6 The support plate 25 shown in detail is used to fix the interior space lighting device 20 to the rear wall 4b of the coolable interior space 4. Figure 5 The supporting plate 25, having the surface facing away from the rear wall 4b, is shown. Figure 6 The support plate 25 with its surface facing the rear wall 4b is shown. The support plate 25 is, in particular, a plastic support plate.

[0074] Figure 7 and Figure 8 A rear view of a portion of the interior space lighting fixture 20 is shown, and Figure 9 A cross-section of a portion of the interior space lighting device 20 is shown after the cover 21 has been removed.

[0075] The support plate 25 includes a frame 26, and a cover 21 is fixed to the frame 26.

[0076] The planar optical conductor 22 includes a first surface 22a and a second surface 22b opposite to the first surface 22a. The first surface 22a faces the inner container 3 (or the rear wall 4b), and the second surface 22b of the optical conductor 22 faces the cover 21.

[0077] The interior space lighting device 20 includes at least one lighting device that couples its light into a planar light conductor 22, thereby enabling the planar light conductor 22 to couple light out from its second surface 22b.

[0078] In the present embodiment, the lighting device consists of a first circuit board 23 having a plurality of LEDs arranged side by side and a second circuit board 24 having a plurality of LEDs arranged side by side.

[0079] The planar optical conductor 22 rests with its first surface 22a against the surface of the carrier plate 25 that is away from the inner container 3, thereby clamping the planar optical conductor 22 between the cover 21 and the carrier plate 25.

[0080] In the current embodiment, the carrier plate 25 includes a first channel 25a and a second channel 25b, which are arranged, for example, on the right and left sides of the carrier plate 25. A first circuit board 23, along with its LEDs, is arranged in the first channel 25a, and a second circuit board 24, along with its LEDs, is arranged in the second channel 25b, so that these LEDs can laterally couple their light into the planar photoconductor 22.

[0081] In particular, by arranging these circuit boards 23, 24 in these channels 25a, 25b, light is coupled from the end side into the planar photoconductor 22.

[0082] These photoconductor plates (or planar photoconductors 22) are positioned between the two circuit boards 23, 24 (or the two channels 25a, 25b).

[0083] In the present embodiment, the cover 21 is fixed to the frame 26 of the support plate 25 by means of an adhesive 27 (which has particularly waterproof properties).

[0084] In the current embodiment, the carrier plate 25, the planar optical conductor 22 and the cover 21 each include a corresponding opening 28, through which the retaining device 12 for the grid bottom 7 extends.

[0085] Furthermore, in the present embodiment, the support plate 25 includes a lifting wall 28a in the area of ​​its opening 28, the lifting wall 28a having an edge on which the cover 21 rests (particularly by means of adhesive 27) on the edge.

[0086] In the present embodiment, the carrier plate 25, the light conductor 22, and the cover 21 include additional openings 29 corresponding to these channel openings 11, so that air cooled by the cooling device 9 can reach the coolable interior space 4 via the air channel, via its channel openings 11, and via these additional openings 29.

[0087] Furthermore, in the present embodiment, the support plate 25 includes a lifting wall 29a in the area of ​​its additional opening 29, the lifting wall 29a having an edge on which the cover 21 rests (particularly by means of adhesive 27) on the edge.

[0088] The lifting wall 28a of the carrier plate 24 in the area of ​​the opening 28 associated with the holding device 12 forms a raised portion, on which the cover 21 is centered. The gaps between the optical conductor 24 and the carrier plate 25, the gaps between the optical conductor 21 and the carrier plates 23 and 24, and the gaps between the circuit boards 23 and 24 and the carrier plate 25 are all covered by the cover 21.

[0089] In the present embodiment, the opening 28 of the support plate 25 and the other opening 29 are unified into a single opening, so that these corresponding lifting walls 28a, 29a extend interlockedly.

[0090] In the present embodiment, the cover 21 is bonded to the frame 26 of the support plate 25 by means of adhesive 27 for fixation. The bonded cover 21 also serves to prevent the planar photoconductor 22 and circuit boards 23, 24 from detaching from the interior space lighting device 20.

[0091] In particular, in the present embodiment, the frame 26 includes a first channel 26a in which adhesive 27 is applied. The first channel 26a, which forms the adhesive channel, extends circumferentially on the frame 26 (i.e., extends particularly around the entire frame 26).

[0092] In the present embodiment, in addition to the first channel 26a, the frame 26 includes a second channel 26b. Preferably, the second channel 26b is smaller than the first channel 26a. Preferably, the second channel 26a extends circumferentially on the frame 26.

[0093] If, for example, excessive adhesive 27 is applied to the first channel 26a, such that the excess adhesive 27 is pressed out of the first channel 26a when the cover 21 is secured to the frame 26, then the second channel 26b is used to receive this excess adhesive. For this reason, it is even possible to prevent, if necessary, adhesive 27 from reaching the interior area of ​​the rear wall.

[0094] Therefore, it is preferable to fix the cover 21 to the frame 26 of the support plate 24 by distributing adhesive 27 into the first channel 26a and pressing the cover 21 against the frame 26 to adhere the cover 21 to the frame 26 for fixation. Preferably, the cover 21 is pressed against the frame 26 in this manner for a prolonged period until the adhesive 27 has completely hardened. Here, excess adhesive is received via the second channel 26b, which is pressed from the first channel 26a into the second channel 26b during the fixing of the cover 21 to the frame 26.

[0095] In the present embodiment, the power supply to the LEDs of these circuit boards 23, 24 is achieved by wires or cables 30, which are connected to the circuit boards 23, 24 on one hand and to an electrical source (not shown in detail) on the other hand via plugs 31.

[0096] In the present embodiment, these channels 25a, 25b are open at their ends (and at their upper ends in the present embodiment) in such a way that the support plate 25 includes corresponding openings 32. This is in Figure 8 As can be seen, the cables 30 are guided to the circuit boards 23 and 24 through these openings 32. In the present embodiment, these openings 32 are closed by means of sealing plugs 34.

[0097] In the current embodiment, the cable 30 is guided downwards via the cable guide 33 on the rear side of the support plate 25 (i.e., on the surface facing the rear wall 4b of the coolable interior space 4). At its lower end, the cable 30 is connected to the plug 31.

[0098] To secure the interior lighting device 20 to the rear wall 4b of the coolable interior space 4, in the current embodiment, the support plate 25 includes locking hooks 38 spray-formed on its rear side. These locking hooks 38 are locked by means of corresponding openings in the rear wall 4b of the coolable interior space 4, or by means of a ladder system that is securely screwed into the household refrigeration appliance 1. Additionally, in the current embodiment, the interior lighting device 20 is securely connected to the coolable interior space 4 by means of three screws.

[0099] For visual reasons, in the current embodiment, the screw head can be seen to be covered by a cover 35, or it can be covered by a fixed glass plate.

[0100] In the current embodiment, the planar optical conductor 22 is made of PMMA (polymethyl methacrylate). The first surface 22a of the planar optical conductor 22 can be structured (or have a coupling structure). This structure can be laser-etched into the first surface 22a using a laser. This structure, in particular, makes the light relatively uniformly distributed from the light coupling site to the center of the planar optical conductor 22.

[0101] Similarly, a structure can be installed on the inner side of the carrier plate 25 (i.e., on the surface of the carrier plate 25 facing the light conductor 22) (e.g., according to DIN EN ISO 4287:2010 Ra=6.3 to Ra=18.0). This structure of the carrier plate 25 enhances light scattering.

[0102] Due to the laser structure, black hot spots may appear on the second surface 22b (front side) of the planar optical conductor 22.

[0103] Alternatively, instead of PMMA, a special material may be used for the planar photoconductor 22, in which particles for achieving light scattering are preferably supplied.

[0104] To make the so-called black hot spots invisible, and to achieve the desired white light distribution of the interior space lighting device 20 if necessary, in the present embodiment, the cover 21 includes a blocking print 36. The blocking print 36, implemented in particular in white, helps to make the near-field and hot spots of individual LEDs invisible.

[0105] In particular, the cover 21 includes a translucent region 37 and a region that surrounds the translucent region 37. Light coupled from the planar light conductor 22 can at least partially pass through the translucent region 37, while the surrounding region is impermeable to light. This surrounding region extends to the edge of the cover 21 and completely covers the LEDs of the two circuit boards 23 and 24. This region surrounding the translucent region 37 is specifically implemented as a barrier print 36.

[0106] List of reference numerals 1. Household refrigeration appliances 2. Thermal insulation body 3 inner container 4. Coolable interior space 4a Sidewall 4b Rear wall 5 door pages 6-door shelf 7 grid 8 drawers 9. Refrigeration equipment 10 Electronic control equipment 11. Channel opening 12. Maintain equipment 20 Interior space lighting fixtures 21 Cover piece 22. Optical Conductor 22a First Surface 22b Second Surface 23 First Circuit Board 24 Second Circuit Board 25 Load-bearing plate 25a First Channel 25b Second Channel 26 Frames 26a First Channel 26b Second Channel 27 Adhesives 28 Opening 28a lifting wall 29. Other openings 29a Lifting Wall 30 Cable 31 plug 32. Empty space 33 Cable guide section 34 Sealing plug 35 Cover 36 Blocking Print 37 Semi-transparent areas 38 Locking Hook

Claims

1. A household refrigeration appliance, comprising: - An insulated body (2) having an internal container (3) defining a coolable internal space (4) for storing food. - Refrigeration equipment (9), said refrigeration equipment is used to cool the coolable interior space (4). - Door leaf (5), the door leaf being used to enclose the coolable interior space (4), and - Interior space lighting device (20), the interior space lighting device being used to at least partially illuminate the coolable interior space (4). in, The coolable interior space (4) includes two side walls (4a) and a rear wall (4b), the surfaces of the side walls and the rear wall facing the coolable interior space (4) being formed by the internal container (3), and The interior space lighting device (20) includes: • At least a semi-transparent cover (21). • A planar optical conductor (22), the planar optical conductor having a first surface (22a) facing the inner container (3) and a second surface (22b) facing the cover (21), and • At least one lighting device that couples its light into the planar light conductor (22), thereby enabling the planar light conductor (22) to couple the light out from its second surface (22b). Its features are, The interior space lighting device (20) has a support plate (25), which is fixed to the rear wall (4b) of the interior container (3) facing the coolable interior space (4) by means of the support plate, and the support plate includes a frame (26), to which the cover (21) is fixed. The planar optical conductor (22) rests its first surface (22a) against the surface of the support plate (25) opposite to the inner container (3), thereby clamping the planar optical conductor (22) between the cover (21) and the support plate (25).

2. The household refrigeration appliance according to claim 1, Its features are, The cover (21) is fixed to the frame (26) of the support plate (25) by means of adhesive (27), and The frame (26) includes at least one first channel (26a) in which the adhesive (27) is disposed for securing the cover (21) to the frame (26).

3. The household refrigeration appliance according to claim 2, Its features are, The frame (26) includes at least one second channel (26) configured to receive excess adhesive that is pressed from the first channel (26a) into the second channel (26b) during the fixing of the cover (21) to the frame (26).

4. The household refrigeration appliance according to any one of claims 1 to 3, Its features are, The container has at least one compartment bottom (6) and a holding device (12). The compartment bottom is arranged in the coolable interior space (4) and is provided for placing food. The holding device is fixed to the rear wall (4b) and is used to fix the at least one compartment bottom (6). The carrier plate (25), the planar optical conductor (22) and the cover (21) each include a corresponding opening (28), and the holding device (12) extends through the corresponding opening.

5. The household refrigeration appliance according to claim 4, Its features are, The support plate (25) includes a lifting wall (28a) in the area of ​​its opening (28), the lifting wall having an edge, on which the cover (21) rests, particularly in an adhesive manner.

6. The household refrigeration appliance according to any one of claims 1 to 4, Its features are, An air passage is provided, which extends at least partially inside the rear wall (4b) and is coupled to the refrigeration device (9), and terminates in the coolable interior space (4) with a passage opening (11). The carrier plate (25), the planar optical conductor (22) and the cover (21) each include an additional opening (29) corresponding to the channel opening (11), so that the air cooled by the cooling device (9) can reach the coolable interior space (4) through the air channel, through the channel opening (11) of the air channel and through the additional opening (29).

7. The household refrigeration appliance according to claim 6, Its features are, The support plate (25) includes a lifting wall (29a) in the area of ​​its other opening (29), the lifting wall having an edge on which the cover (21) rests, particularly in an adhesive manner.

8. The household refrigeration appliance according to any one of claims 1 to 7, Its features are, The interior space lighting device (20) has a first circuit board (23) having a plurality of LEDs arranged side by side as lighting devices. The carrier plate (25) has a first channel (25a), and the first circuit board (23) together with the LEDs of the first circuit board is arranged in the first channel. The first channel (23) is arranged on the carrier plate (25) so that the LED of the first circuit board (23) can couple the light of the LED into the first side of the planar photoconductor (22).

9. The household refrigeration appliance according to claim 8, Its features are, The first circuit board (23) is connected to a cable (30) for at least indirectly connecting an LED on the first circuit board (23). The first channel (25a) is bounded at one end by the wall of the carrier plate (25) and open at the other end. The cable (30) is guided through the open end (32) of the first channel (25a). The interior space lighting device (20) includes a sealing plug (34) that closes the open end (32) of the first channel (25a), and / or The cover (21) includes a semi-transparent area (37) through which light coupled from the planar light conductor (22) can pass at least partially, and the cover includes a region (36) that surrounds the semi-transparent area (37), the surrounded region being impermeable to light, and the surrounded region extending to the edge of the cover (21), and the surrounded region completely covering the LED of the first circuit board (23).

10. A method for manufacturing a household refrigeration appliance according to any one of claims 1 to 9, the method comprising the following steps: - The planar optical conductor (22) is arranged on the carrier plate (25) such that the planar optical conductor (22) rests with its first surface (22a) against the surface of the carrier plate (25) opposite to the inner container (3). - The cover (21) is fixed to the edge (26) of the support plate (25), thereby clamping the planar optical conductor (22) between the cover (21) and the support plate (25), and - The interior space lighting device (20) is fixed to the rear wall (4b), thereby fixing the support plate (25) to the surface of the interior container (3) facing the coolable interior space (4).

11. The method of claim 10, wherein the frame (26) comprises at least one first channel (26a) and at least one second channel (26b), and Securing the cover (21) to the edge of the support plate (25) includes the following steps: - The adhesive (27) is placed into the first channel (26a). - Press the cover (21) against the frame (26) to bond the cover (21) and the frame (26) together for fixation, wherein, Press the cover (21) against the frame (26) for such a long time that the adhesive (27) is completely hardened, and - Excess adhesive is received by means of the second channel (26b) during the fixing of the cover (21) to the frame (26), and the excess adhesive is pressed from the first channel (26a) into the second channel (26b).

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