EP3667209A1 - Household refrigerator - Google Patents

Abstract

Domestic refrigerator (1), comprising a cold air distribution system (60) arranged in a storage room (9), which has a vertical cold air duct section (70) and a horizontal cold air duct section (80), the horizontal cold air duct section (80) branching off from the vertical cold air duct section (70) , in the vertical cold air guide section (70) a cold air flow (62) along a rear wall (3) of the interior (9) in the height direction of the interior (9) is flowable and in the horizontal cold air guide section (80) the cold air flow (62) in the depth direction of the Interior (9) flowable, the horizontal cold air duct section (80) forms a cold air duct (81) in which the cold air flow (62) can flow through the horizontal cold air duct section (80), between a ceiling plate (85) and one with the ceiling plate (85) assembled base plate (90), the ceiling plate (85) having a storage area (87) for stored goods, w Elcher is formed from a heat-conducting material, characterized in that the storage area (87) is provided to provide a thermal bridge between the stored goods placed on the storage area (87) and the cold air flow (62) flowing in the cold air duct in the operating state of the horizontal cold air guide section (80) (81) to form.

Description

Field of the Invention

The present invention relates to a household refrigeration device having a storage area for stored goods and a cold air distribution system for rapid cooling of the stored goods on the storage area.

State of the art

From the CN106918191A A household refrigeration device is known, comprising a cover plate with an integrated cold air duct for cooling a bearing shell arranged under the cover plate. The cold air flow flows from a cold air distribution system along the integrated cold air duct of the cover plate to a front area of the bearing shell and is discharged there. The cold air flow then flows back from the front area of the bearing shell along the bottom area of the bearing shell to the cold air distribution system. A cold air stream flows around the bearing shell and cools it indirectly.

Disclosure of the invention

The household refrigeration device according to the invention comprises a cold air distribution system which is arranged in a storage space and which has a vertical cold air guide section and a horizontal cold air guide section, the horizontal cold air guide section branching off from the vertical cold air guide section, in the vertical cold air guide section a cold air flow is flowable in and along the rear wall of the interior in the height direction of the interior the horizontal cold air duct section, the cold air flow is flowable in the depth direction of the interior, the horizontal cold air duct section forms a cold air duct in which the cold air flow is flowable through the horizontal cold air duct section, between a ceiling plate and one with the Ceiling plate assembled floor plate, the ceiling plate has a storage area for storage goods, which is formed from a heat-conducting material, characterized in that the storage area is provided to provide a thermal bridge between the stored goods on the storage area and the cold air flow flowing in the operating state of the horizontal cold air duct section to form in the cold air duct.

The user of a household refrigeration device has a high need for rapid, efficient and gentle cooling of food brought into the storage room, in particular of warm or cooked food or beverages. Surprisingly, it has been shown that efficient and rapid cooling of the stored goods placed on a storage area is possible if a cold air stream flows past the storage area, which is in direct heat exchange with the storage area formed from a heat-conducting material. For this purpose, a wall surface of the storage area facing the base plate is in indirect or, preferably, direct heat exchange with the cold air flow flowing in the horizontal cold air duct section, and a wall surface of the storage area facing away from the base plate is in indirect or, preferably, direct heat exchange with the stored goods placed on the storage area, in particular warm items placed on the storage area or cooked food or bottle containers with a liquid suitable for consumption. It has also been found that good heat transfer between the stored goods placed on the storage area is possible via the storage area formed from a heat-conducting material, although the contact area between the stored goods and the storage area actually appears too small to effect efficient cooling. In addition, one would expect that the cooled storage area tends to condense. However, it has been found that the condensation at the storage area of an intermediate floor is low over a short defined period of time and the cooling effect of the food stored on the storage area according to the invention is surprisingly good. On the part of the user, it is desirable to cool warm or cooked dishes from plus 65 ° C to a temperature of plus 10 ° C within 120 minutes. In general, it is desirable that warm or hot dishes cool quickly, at least within of 2 hours, so that the microbiologically critical area is run through quickly. Due to the rapid cooling or lower temperature, chemical reactions and biological processes that make food inedible and medication unusable, for example, run more slowly. This improves the product quality and the chemical and sensory properties - smell, appearance, taste, texture - of the food. By means of the present invention, a storage area can be represented which has a rapid cooling rate of warm or cooked foods than conventional known storage shelves due to a cold air stream flowing directly past the storage area. In addition, other stored goods in the storage room are only slightly or not at all influenced by the concentrated cooling of the storage area in the horizontal cold air duct section. Accordingly, overcooling or even frost damage from other stored goods in the storage room is reduced to completely avoided. In addition, the household refrigeration device according to the invention does not require the user to get used to much and is easy to use.

A “household refrigerator” is to be understood in particular as a cabinet-shaped device which is usually operated electrically and independently keeps the temperature inside low. The interior of the refrigerator is cooled by means of a cooling unit that is often located on the rear and regulated by a temperature controller. Household refrigerators are used for the storage of food. The lower temperature means that chemical reactions and biological processes that make food inedible and medication unusable, for example, run more slowly. The usual operating temperatures inside domestic refrigeration units are between plus 2 ° C and plus 8 ° C in cold rooms, between minus 14 ° C and minus 18 ° C in freezer rooms and between minus 2 ° C and plus 4 ° C in freezer compartments. The housing of the cooling compartments is thermally insulated in order to keep the energy consumption low to maintain the difference to the ambient temperature.

A “cold air distribution system” is to be understood in particular as a distribution system which is intended to distribute the cold air cooled by the evaporator in the various storage rooms and storage compartments. The "cold air distribution system" is intended to ensure an even temperature and humidity distribution in the storage room or in the storage compartments.

An “interior” is to be understood in particular to mean a space which is suitable for storing food and for arranging equipment elements and cooling systems required for cooling the interior.

A “vertical cold air duct section” is to be understood in particular as a duct in which the cold air can flow essentially in the direction of the ceiling wall of the interior.

A “horizontal cold air guide section” is to be understood in particular as a guide in which the cold air can essentially flow from a rear wall in the direction of a door of the interior or in the depth direction of the storage room

A “cold air duct” is to be understood in particular as a duct which is suitable for guiding the cold air in a closed space from a first defined point to a second defined point in the interior.

A “ceiling tile” is to be understood in particular as a tile that closes off a room at the top. In the sense of the invention, the cold air duct formed by the ceiling plate and base plate closes off at the top or terminates in a storage space or storage compartment arranged above the horizontal cold air duct section.

A “floor slab” is to be understood in particular as a slab which closes off a room at the bottom. In the sense of the invention, the cold air duct formed by the ceiling plate and base plate closes down or closes to a storage space or storage compartment arranged below the horizontal cold air duct section.

A “storage area” is to be understood in particular as an area which enables storage and storage of stored goods. This can be a horizontal plate or a plane that is supported on one of the side walls.

A "thermally conductive material" is understood in particular to mean a material which, from a professional point of view, is classified as a good thermally conductive material. According to the invention, metals or carbon-based materials are classified as good heat-conducting materials. From a professional point of view, plastic-based materials, for example, are classified as poorly heat-conducting.

“Flowable” is to be understood in particular as being flowable in particular or generally meaning that the cold air flows or flows from one defined point to another defined point in the interior.

“Branches” is to be understood in particular to mean that the horizontal cold air duct section is coupled or connected to the vertical cold air duct section and is fed with cold air through the vertical cold air duct section if required. So that an efficient cold air transition between the vertical cold air guide section and the horizontal cold air guide section is possible, a correspondingly sealing coupling of the horizontal cold air guide section to the vertical cold air guide section should be provided.

“Joined” is to be understood in particular to mean that the top plate and the bottom plate are advantageously connected to one another via at least one non-positive connection and / or at least one positive connection, for example via a plug connection and / or a latching connection and / or a tongue and groove connection and / or a clamp connection and / or a magnetic connection and / or a further connection which appears to be useful to the person skilled in the art, in which case a user can advantageously disconnect the connection without destruction. However, the cover plate and base plate can also be connected or joined together in one piece, so that a non-destructive removal of the cover plate and base plate is not possible. By "one-piece" is to be understood in particular to be understood to be at least integrally bonded, for example by means of a welding process, an adhesive process, a gating process and / or another process which seems sensible to a person skilled in the art, and / or advantageously to be formed in one piece, for example by a Manufactured from a single casting and / or by manufacturing in a one- or multi-component injection molding process and advantageously from a single blank.

"Cold air flow flowing in the cold air duct in the operating state of the horizontal cold air guide section" is to be understood to mean that the horizontal cold air guide section is not always in operation with the operation of the household refrigeration device, but when a refrigeration requirement of the storage space is reported or the user of the household refrigeration device requests the operation of the horizontal cold air guide section .

For the purposes of the present invention, “stored goods” are to be understood in particular as foods or foodstuffs suitable for consumption. But it can also mean medication. Of course, these can be stored in pots, tubes, packaging, bottles or other common storage media for food or medication for storage in the storage room of household refrigeration devices for hygienic purposes.

“Thermal bridge” is to be understood in particular to mean heat transfer or heat conduction between the metallic storage area and a fluid or a cold air flow. The heat transfer always takes place from "warm" to "cold" in three possible different ways. With heat conduction or conduction, kinetic energy is transferred between neighboring atoms or molecules without material transport. This type of heat transfer is an irreversible process and transports the heat on average from the higher energy level - with higher absolute temperature - to the lower level - with lower temperature. In the case of convection or heat flow, heat from a flowing fluid, for example a cold air flow, is carried along as internal energy or enthalpy. Convection occurs when a flowing fluid absorbs or releases thermal energy from a surface.

Advantageous embodiments and further developments result from the subclaims and from the description with reference to the figures.

According to one embodiment of the invention, the parking area may be flat or flat. It is thereby achieved that cooking containers of different sizes, such as pots or trays, in which the warm or cooked foods are usually stored, can be placed on the storage area. Accordingly, an efficient heat exchange between the cooking containers and the storage area is also possible, since the bottom of the cooking containers such as pots or trays is in direct contact with the storage area.

According to one embodiment of the invention, the thermally conductive material of the storage area may have a higher coefficient of thermal conductivity than 10 W / (m ^∗ K). In order to enable sufficient heat transfer through the storage area of the ceiling panel, the storage area according to the present invention has sufficient thermal conductivity. It is thereby achieved that the parking area is formed from a material which has good to very good heat-conducting properties.

According to one embodiment of the invention, it may be that the storage area is formed from a more thermally conductive material than the predominant part of the base plate, preferably that the storage area is formed from a metallic material or from a carbon-based material and the base plate from a non-metallic material. This has the advantage that the cooling capacity of the cold air flow concentrates on the storage area and the cooling capacity losses through the base plate are reduced. The heat-conductive material of the storage area can be brass, aluminum or stainless steel. The base plate is preferably formed from a plastic-based material. The thermal conductivity of plastics is much lower than that of metals. Since plastics have a comparatively low heat transfer compared to metals or materials based on carbon, the horizontal cold air duct section can be operated efficiently because cooling power losses via the base plate are reduced or largely avoided.

According to one embodiment of the invention, it may be that the horizontal cold air duct section is designed as an intermediate floor for dividing the storage space into a plurality of storage compartments. This has the advantage that the horizontal cold air duct section can be arranged as an intermediate floor in the storage space like a conventional glass shelf. The storage area according to the invention is thus easily accessible to the customer. In addition, it is possible that a household refrigeration device can be equipped with the horizontal cold air duct section and storage area for warm or cooked food or with a conventional glass shelf, without major modifications to the household refrigeration device. The air outlet in the horizontal cold air duct section can then serve as an additional air outlet in the storage room or be closed by a cover.

According to an embodiment of the invention, thermal insulation may be arranged on the base plate of the horizontal cold air duct section, which is preferably provided on the surface of the base plate facing the cold air duct and preferably extends essentially over the entire surface of the base plate. This has the advantage that the cold losses or the heat transfer via the base plate is additionally reduced by a heat insulation layer. Accordingly, there is sufficient cooling capacity for cooling the storage area and the household refrigeration device can be operated efficiently.

According to one embodiment of the invention, the cold air distribution system may have an adjustable cold air flow distributor which is designed to direct the cold air flow into the cold air duct of the horizontal cold air duct section. This has the advantage that the user of the household refrigeration device, if the storage area needs to be cooled, either manually brings the cold air flow distributor into the appropriate position or can initiate activation of the cooled storage area by adjusting the device electronics. It is therefore possible that the customer only activates the cooled storage area when required and otherwise the cooling of the parking area is deactivated. Furthermore, it is possible that with the activation of the storage area, a timer can be activated, which automatically deactivates the cooling of the storage area after a period of 120 minutes or the user by means of an acoustic or optical signal to end the cooling of the storage area or the direct cooling of the Stored goods or the food communicates. The message can also be transmitted to an external display surface of a mobile phone via a radio interface built into the refrigerator.

According to one embodiment of the invention, control electronics of the household refrigeration device can be designed to control the adjustable cold air flow distributor as a function of a sensor, in particular a temperature sensor, arranged in the horizontal cold air duct section. This has the advantage that a cold air supply can be adapted to the required cooling requirement of the storage area by a sensor arranged in the cold air duct. If the food to be cooled through the storage area requires a rather low cooling requirement, then the cooling capacity can also be set lower.

According to one embodiment of the invention, the sensor, in particular the temperature sensor, is arranged on the storage area and is designed to sense the temperature at a defined point in the storage area. The sensor scans the temperature in a defined area of the storage area. Consequently, it is possible to regulate the cooling requirement of the storage area or the cold air supply of the horizontal cold guide section. Accordingly, the cold air supply to the horizontal cold air duct section can be reduced if a certain lower temperature value has been detected by the temperature sensor, and increased again if a certain upper temperature value has been detected by the temperature sensor. Since the initial temperature or the cooling rate of the goods to be cooled is always different and therefore there is always a different cooling requirement, the cooling effect can be adapted to the cooling requirement by regulating the storage area. The sensor is advantageously arranged at a central point of the storage area or at least on an area of the storage area which is indicated by a marking as a storage area for the stored goods or warm or cooked food on the ceiling plate. This results in a more energy-efficient operation of the household refrigeration device according to the invention.

According to an embodiment of the invention, an air guiding device arranged in the cold air duct can be designed to bring the cold air flow into heat-conducting contact with the storage area. This has the advantage that the cold air flow is directed through the air guiding device in the direction of the ceiling plate or in the direction of the storage area arranged in the ceiling plate or in defined paths in the cold air duct, so that an efficient heat exchange between the storage area and the cold air flow is made possible.

According to one embodiment of the invention, the air guiding device may be formed by a flow cross section of the cold air duct that is reduced in height, the reduction of the flow cross section being formed by an inclination or step on the surface of the base plate facing the cold air duct. In order to enable adequate heat transfer between the hot or cooked food arranged on the storage area and the cold air flow flowing in the cold air duct section during operation of the storage area, it is advantageous if the flowing cold air flow flows past the storage area directly adjacent to the storage area or through the ceiling plate flows to the area of the ceiling plate which forms the storage area. The step or the inclination is preferably in the area of the parking area or in the marked area Area of a parking area, so that the increased cooling effect generated by the step or the inclination acts on the parking area.

According to one embodiment of the invention, the air guiding device may be formed by a local projection on the surface of the base plate facing the cold air duct. This has the advantage that the flow cross section can be reduced using simple means. The local projection is preferably arranged in the area of the parking area, so that the storage area of the cold air generated by the projection cools the parking area.

According to one embodiment of the invention, the air guiding device can be formed by a radius or an inclined plate at the entrance of the cold air duct. The radius or the inclined plate at the entrance area of the cold air duct can align the air flow in such a way that the cold air flow flows directly adjacent to the storage area or flows towards the storage area or the cold air flow impinges on the storage area. This enables simple and inexpensive means to cool the parking area more efficiently or to transfer heat more efficiently between the parking area and the cold air flow.

According to one embodiment of the invention, it may be that the air guiding device is designed as a cooling fin which extends elongated in the direction of flow or transverse to the direction of flow of the cold air flow through the cold air duct, which is connected in a heat-conducting manner to the storage area and projects into the cold air duct in the direction of the base plate. The ceiling plate should advantageously have a plurality of cooling fins projecting into the cold air duct. The cooling fin can be integrally connected to the ceiling plate or can be arranged in a multi-part construction as an intermediate element between the cold air duct and the ceiling plate. In order to ensure sufficient heat transfer in the case of a multi-part construction, the cooling fin should be formed in direct contact with the storage surface and the cooling fins should be flowed around by the cold air flow. The cooling fins are advantageously arranged on the storage area, so that the cooling effect is strongest there. Due to the cooling fins, the heat transfer between the Storage area and the cold air flow further improved. Consequently, by forming an improved heat transfer between the storage area and the cold air flow, a faster cooling of the stored goods on the storage surface can be brought about and, overall, a more energy-efficient operation of the household refrigeration device according to the invention is made possible.

According to one embodiment of the invention, the cooling fin may define a flow path within the cold air duct, which is intended to guide the cold air flow to a predefined area of the storage area. The cooling fins thus have a double function. On the one hand the cooling fin promotes the heat transfer between the storage area and the cold air flow and on the other hand the cooling fins guide the cold air flow into one of several defined areas of the storage area. As a result, the air guiding function is implemented by the cooling fin. A large number of cooling fins can form a large number of flow paths of the cold air flow, so that different areas of the storage area can be cooled more or less with design measures.

According to an embodiment of the invention, it may be that the storage area locally indicates a marking on the ceiling plate. Accordingly, the user can be made aware that particularly efficient cooling is possible in the marked storage area or that the marking simply indicates the storage location or storage area for the stored goods or for the warm or cooked food on the ceiling plate. The marking can be a print, foil, embossing or inscription. The marking can also be indicated by an electrical display area or light source. Since edge areas of the storage area are cooled less strongly by the air flow, the central area or the area with the greatest cooling can be indicated on the storage area by a marking.

According to one embodiment of the invention, the storage area can be divided into a first cooling section and a second cooling section, the first cooling section having a higher cooling rate than the second cooling section. This has the advantage that the user of the invention Household refrigeration device several storage areas with different cooling capacity or cooling time can be made available. The horizontal cold air duct section is correspondingly designed such that the cold air flow in the cold air duct is dimensioned and aligned in such a way that a different cooling capacity is present at the first and second cooling areas. This has the advantage that the customer can decide whether, for example, he would like to have stored goods cooled to 10 ° C in 60 minutes or 120 minutes. The first cooling area and the second cooling area can advantageously be identified by a marking for easy identification by the user.

According to one embodiment of the invention, a cold air return to the vertical cold air guide section may be integrated in the horizontal cold air guide section. Correspondingly, the horizontal cold air guide section has an area in which the cold air flows from the rear wall in the direction of a door of the domestic refrigeration appliance, and an area in which an air flow or the warmer return air flows in the opposite direction. This has the advantage that cold air which has already been heated is not discharged into the interior or in the area of the storage space for stored goods, as a result of which undesired temperature fluctuations in the interior or storage space for refrigerated goods are avoided.

According to one embodiment of the invention, the vertical cold air guide section may have at least one air outlet which discharges cold air into an area of the interior directly above the horizontal cold air guide section or into a storage compartment immediately above the horizontal cold air guide section. It is thereby achieved that the cooling of the stored goods placed on the storage area takes place indirectly from an air outlet of the vertical cold air guide section by an air flow in the horizontal cold air guide section as well as by direct cooling through a cold air flow. Accordingly, an even faster cooling of the stored goods on the storage area is possible.

With the information "top", "bottom", "front", "back," horizontal "," vertical "," depth direction "," width direction "," height direction "etc., these are in accordance with the intended use and arrangement of the device and at to a given position and orientation given in front of the device and looking in the direction of the device.

Further features of the invention result from the claims, the figures and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures, can be used not only in the respectively specified combination, but also in other combinations, without the scope of the invention leave. Embodiments of the invention are thus also to be regarded as encompassed and disclosed, which are not explicitly shown and explained in the figures, but can be derived from the explanations explained and can be generated by separate combinations of features. Embodiments and combinations of features are also to be regarded as disclosed, which therefore do not have all the features of an originally formulated independent claim. Furthermore, versions and combinations of features, in particular those explained above, are to be regarded as disclosed, which go beyond or differ from the combinations of features set out in the references of the claims.

Brief description of the drawings

The accompanying drawings are intended to provide further understanding of the embodiments of the invention. They illustrate embodiments and, in connection with the description, serve to explain principles and concepts of the invention.

Other embodiments and many of the advantages mentioned result from the drawings. The illustrated elements of the drawings are not necessarily shown to scale with respect to one another.

Figur 1

eine seitliche Schnittansicht des erfindungsgemäßen Haushaltskältegeräts;

Figur 2

eine seitliche Schnittansicht einer weiteren Ausführungsform des erfindungsgemäßen Haushaltskältegeräts;

Figur 3

sind schematische Schnittansicht eines Kaltluftverteilungssystems des erfindungsgemäßen Haushaltskältegeräts;

Figur 4

sind schematische Schnittansichten einer Ausführungsform des horizontalen Kaltluftführungsabschnitts des erfindungsgemäßen Haushaltskältegeräts;

Figur 5

eine perspektivische Ansicht des Kaltluftverteilungssystems des erfindungsgemäßen Haushaltskältegeräts.

Show it:

Figure 1

a sectional side view of the household refrigerator according to the invention;

Figure 2

a sectional side view of another embodiment of the household refrigerator according to the invention;

Figure 3

are schematic sectional view of a cold air distribution system of the household refrigerator according to the invention;

Figure 4

are schematic sectional views of an embodiment of the horizontal cold air duct section of the household refrigerator according to the invention;

Figure 5

a perspective view of the cold air distribution system of the household refrigerator according to the invention.

Detailed description of the embodiments

In the figures of the drawings, the same reference symbols denote the same or functionally identical elements, parts or components, unless stated otherwise.

In Fig. 1 a sectional side view of the household refrigeration device 1 according to the invention is shown. The household refrigerator 1 has a body 2 with an interior 9. The interior 9 has a cooling space 10 arranged above and a freezing space 11 arranged below the cooling space 10. The freezer compartment 4 is generally used to freeze frozen food at around minus 18 ° C. In the rear area of the freezer compartment 11 there is an evaporator compartment 18 with an evaporator unit 20 arranged therein. The cold room 10 and the freezer room 11 are supplied with cold air from the evaporator room 18 via a cold air distribution system 60. The storage rooms or the cooling room 10 and the freezer room 11 are tempered to a target temperature that can be set by the user by supplying cold air. The freezer compartment 11 has a first heat-insulated door 5 for closing an access opening to the freezer compartment 11.

The cooling space 5 is generally used for frost-free cooling of stored goods, preferably at temperatures between plus 4 ° C. and plus 8 ° C. The cooling space 5 can, however, also be designed as a zero-degree compartment or comprise a zero-degree compartment, which is provided for keeping fruit or vegetables fresh. The cooling space 5 has a rear wall 3, on which a cold air distribution system 50 is arranged, which has a vertical cold air guide section 70 and a horizontal cold air guide section 80 branching off from the vertical cold air guide section 70. The vertical cold air guide section 60 has air outlets 40 which discharge the cold air into the plurality of storage compartments 14 of the cooling space 10. In addition, a further air outlet 75 is arranged directly in the area of the storage compartment 10 above the horizontal cold air duct section 80. The air outlet 75 discharges the cold air directly into one above the horizontal cold air guide section 80 and cools the storage compartment 14 directly above the horizontal cold air guide section 80. The storage compartments 14 are divided by shelves 15 arranged in the cooling space 10. The shelves 15 serve to store stored goods and are usually designed as glass plates. The cold air distribution system has a cold air flow distributor 65 in the form of a rotary valve 67. The rotary valve 67 is provided to divide the cold air flow 62 coming from the evaporator chamber 18 between the vertical cold air guide section 70 and the horizontal cold air guide section 80. It is thus possible for a partial flow to flow into the horizontal cold air guide section and for a partial flow to flow into the vertical cold air guide section 70. It is also possible for the rotary valve 67 to direct the cold air flow 62 completely into the horizontal cold air guide section 80 or completely into the vertical cold air guide section 70. In this embodiment, the rotary valve 67 completely guides the cold air flow 62 into the horizontal cold air guide section 80, as a result of which the maximum cooling of the storage area 87 is effected. The vertical cold air guide section 70 has an air flap 25 which releases or blocks the cold air flow 62 into the cooling space 10. The air flap 25 is closed when the cooling space 10 or the horizontal cold air duct section 80 does not report any cooling requirement. In the opposite case, the air flap 25 is open when the cooling space 10 and / or the horizontal cold air duct section 70 report a cooling requirement.

According to Figure 1 the horizontal cold air duct section 80 has a ceiling plate 85 with a storage area 87 formed by the ceiling plate 85. The storage area 87 is provided so that the stored goods or containers with stored goods can be stored on them. A pot 45 is placed on the storage area 87 for cooling a food that is stored therein and is suitable for consumption. The storage area 87 for thermal exchange with the cold air flow 62, which flows during operation of the horizontal cold air guide section 80 in a cold air duct 81 in the depth direction of the interior 9 at the cooling chamber 10, is made of a highly heat-conducting material, preferably brass, aluminum or stainless steel. The storage area 87 can also be formed from another material which has a thermal conductivity coefficient of at least 10 W / (m ^∗ K). By forming the storage area 87 from a highly heat-conducting material, the thermal energy can be easily and efficiently dissipated from the stored goods or food or warm or cooked food stored on the storage area 87 and transported away to the evaporator space 18 by the cold air flow 62. The cold air flow 62 flows in the horizontal cold air duct section 80 in the depth direction of the cooling room 10 or from the rear wall 3 to the second door 6 of the cooling chamber 9. The horizontal cold air duct section 80 has a base plate 90 which forms the cold air duct 81 with the ceiling plate 85. In the cold air duct 81, the cold air flow 62 flows through the horizontal cold air guide section 80. In the storage compartment 14 below the horizontal cold air guide section, a bearing shell 16 is arranged, which is provided for the storage of fruit and vegetables. The horizontal cold air guide section 80 has an integrated cold air return 30, which returns the cold air flow 62 flowing past the storage area 87 to the vertical cold air guide section 70. The warmer, recirculated cold air via the cold air return 30 is led to the evaporator chamber 18 via a duct system and is cooled there again by the evaporator 20. In addition, the household refrigeration device 1 has a heat insulation 17 between the housing 1 and the interior 9, so that the heat input from the surroundings can be kept as low as possible. A partition 7 is arranged between the cooling space 10 and the freezing space 11, which also provides thermal insulation has to keep the heat exchange between the freezer compartment 11 and the refrigerator compartment 10 low.

In Figure 2 a sectional side view of a further embodiment of the household refrigeration device 1 according to the invention is shown. Compared to the embodiment Figure 1 the embodiment differs according to Figure 2 in that the rotary valve 67 releases the cold air flow 62 into the vertical cold air guide section 60 and blocks the cold air flow 62 into the horizontal cold air guide section 80. Correspondingly, the cooling space 10 experiences the maximum cooling capacity via the vertical cold air duct section 70 and the cooling capacity of the horizontal cold air duct section is essentially switched off. The storage compartment 14 arranged directly above the horizontal cold air guide section 80 is cooled only by the air outlet 75 in the vertical cold air guide section 70. Thermal energy from the material stored on the horizontal cold air duct section 80 is likewise conducted to the cooling space 10 through the heat-conductive storage area 87. In this case, the heat-conductive storage area 87 acts as an enlargement of the surface of the stored goods or the food and contributes to the cooling of the stored goods or the food. However, active cooling of the dishes arranged on the horizontal cold air guide section 80 is not effected via the horizontal cold air guide section 80.

In Figure 3a A first schematic sectional view of a cold air distribution system 60 of the household refrigeration device 1 according to the invention is shown. The cold air distribution system 60 has a vertical cold air guide section 70 and a horizontal cold air guide section 80 branching off from the vertical cold air guide section 70. A cold air flow distributor 65 in the form of an air flap 68 is arranged in the branch from the vertical cold air guide section 70 into the horizontal cold air guide section 80. The air flap 68 comprises a plate 681 and a pivot axis 682. The plate 681 projects radially from the pivot axis and rotates about the pivot axis 682 in a defined area. In this embodiment, the defined area is limited by a stop 683. The horizontal cold air duct section 80 has a ceiling plate 85 with a storage area formed by the ceiling plate 87 for stored goods or food. A cold air duct 81 is formed between the ceiling plate 85 and the bottom plate 90, which defines the flow path of the cold air flow 62 through the horizontal cold air guide section 80. A sensor 56, in particular a temperature sensor, is arranged in the cold air duct 81 in the area of the storage area 87, which sensor senses the actual temperature at the storage area 87. If the temperature sensed by the sensor at the storage area 87 is too high, this may have the reason that the cooling effect due to the horizontal cold air duct section is too low. Based on the sensor signal, the volume flow of the cold air flow 62, which is directed into the horizontal cold air guide section 80, or the cooling effect of the storage area 87 can be increased. If the detected actual temperature is too low, the volume of the cold air flow 62 into the horizontal cold air guide section 80 can be reduced. Sensor 56, in particular temperature sensor, can thus be used to regulate the cooling capacity of storage area 87. Consequently, the household refrigeration device 1 according to the invention can be operated with the storage area 87 in a more energy-efficient manner, since the cooling capacity of the storage area 87 can be adapted adaptively to the cooling requirement. In this embodiment, the air flap 68 completely directs the air flow 62 into the cold air duct 81 of the horizontal cold air guide section 80. As a result, the air flap 68 blocks the air supply to the cold air duct 71.

In Figure 3b A second schematic sectional view of the cold air distribution system 60 of the household refrigeration device 1 according to the invention is shown. Compared to the embodiment Figure 3a the embodiment differs according to Figure 3b in that the cold air flow distributor 65 or air flap 68 completely blocks access to the cold air duct 81 of the horizontal cold air duct section. In this embodiment, the cold air flow distributor 65 or the air flap 68 guides the cold air flow 62 completely into the cold air channel 71 of the vertical cold air guide section 70. As a result, cooling of the storage area 87 by the cold air flow 62 is prevented and the cold air supply via the vertical cold air guide section 70 is released.

In Figure 3c A third schematic sectional view of the cold air distribution system 60 of the household refrigeration device 1 according to the invention is shown. Compared to the embodiments Figure 3a and 3b the embodiment differs according to Figure 3c in that the cold air flow distributor 65 or the air flap 68 directs a partial volume of the cold air flow 62 into the cold air channel 71 of the vertical cold air guide section 70 and a partial volume of the cold air flow 62 into the cold air channel 81 of the horizontal cold air guide section 80. Consequently, the vertical cold air guide section 70 and the horizontal cold air guide section 80 supplied with cold air at the same time. This is advantageous if the cooling space 10 and the storage area 87 report a cooling requirement at the same time to the control unit 13 (not shown here) of the household refrigeration device 1.

In Figure 4a A schematic sectional view of a first embodiment of the horizontal cold air guide section 80 of the household refrigeration device 1 according to the invention is shown. The illustration shows a schematic sectional view in the longitudinal direction of the cold air duct 81. In this embodiment of the invention, the horizontal cold air duct section 80 has a cold air duct 81 formed between a base plate 90 and the ceiling plate 85. The base plate 90 and ceiling plate 85 can be connected to one another in a form-fitting manner, such as latching or screwing, in an integral manner, such as gluing or welding, or in one piece. The ceiling plate 85 has a storage area 87, which can be formed from a metallic or from a carbon-based material. Of course, the storage area 87 can be formed in one piece with the ceiling plate 85. The storage area 87 is designed in such a way that a user of the household refrigeration device 1 can store stored goods or food there, which can be cooled more quickly via the storage area 87 than is usually the case via the cooled room air of the interior. The storage area 87 is cooled by a cold air flow 62, which can flow through the cold air channel 81 during operation of the horizontal cold air duct section 80, and extracts the heat energy from the foods arranged on the storage area 87 or cools the stored goods, such as, for example, arranged on the storage area 87 Pot with hot or cooked food in it, quickly. In the cold air duct 81 is one through the heat insulation layer 91 trained air guide 50 shown. According to this embodiment, the air guide device 50 is designed as an incline 505. The inclination 505 is provided to bring the cold air flow 62 closer or in heat-conducting contact with the storage area 87. Due to the inclination 505, the height of the cold air channel 81 in the flow direction of the cold air flow 62 is reduced from a distance D1 to a distance D2 that is reduced compared to the distance D1. The distance D1 preferably has a width of approximately 15 mm to 30 mm. The diameter D2 preferably has a smaller distance of approximately 10 mm to 14 mm compared to the distance D1. By reducing the flow cross section in the cold air duct 81, an improved and more efficient cooling of the storage area 87 can be brought about.

In Figure 4b A schematic sectional view of a second embodiment of the horizontal cold air guide section 80 of the household refrigeration device 1 according to the invention is shown. Opposite the Figure 4a points the Figure 4B a local step 504 or a local protrusion 503 as an air guiding device 50 instead of an inclination 505. The local step 504 or the local projection are formed on the surface of the base plate 90 facing the cold air duct 81. The local step 504 or the local projection 503 is formed by the heat insulation layer 91. The step 504 or the local projection 503 can deflect the air flow 62, which essentially causes the air flow 62 to impact the storage area 87. Compared to an incline 505, the local step 504 or the local projection 503 can achieve a much greater deflection of the air flow 62, so that defined areas of the storage area 87 can be cooled more intensively. This is advantageous if the central area of the storage area 87 is cooled heavily, so that the cooling of the storage area 87 can be represented more efficiently overall. It is particularly advantageous if the central area of the storage area 87 is cooled heavily, since the peripheral area is also sufficiently cooled by the heat-conductive storage area 87.

In Figure 4c is a schematic sectional view of a third embodiment of the horizontal cold air duct section 80 of the household refrigerator according to the invention 1 shown. Opposite the Figure 4a and 4b In this embodiment, a sectional view is shown transversely to the longitudinal direction of the cold air duct 81. In this embodiment, the air guiding device 50 is designed as a cooling fin 506. The cooling fin 506 is advantageously formed in one piece with the storage area 87. A plurality of cooling fins 506 are advantageously arranged on the storage area 87. The large number of cooling fins 506 can be used to produce a large number of flow paths 88 which divide the air flow 62 into a large number of air flows 62 in the cold air duct 81. Because the cooling fins 506 define a plurality of flow paths 88 within the cold air duct 81, the cold air flow 92 can be guided to a predefined area of the storage area 87. This has the advantage that the cooling fins 506, on the one hand, make the heat transfer from the storage area 87 to the cold air flow 62 more efficient and, on the other hand, divide the cold air flow 62 into a plurality of cold air flows 62 and can lead them to defined areas of the storage area 87.

In Figure 5 A perspective view of the cold air distribution system 60 of the household refrigeration device 1 according to the invention is shown. The differs from the previous embodiments Figure 5 in that the storage area 87 or the storage areas 87 is indicated locally by a marking 871 on the ceiling plate 85. Accordingly, the user can be made aware that the marked storage area has particularly efficient cooling or that the marking simply indicates the storage location or storage area for warm or cooked dishes on the ceiling plate 85. A plurality of markings 871 can also be provided, so that the storage area 87 of the horizontal cold air guide section 60 is defined by a first cooling section 872 and a second cooling section 873. In this case, the first cooling section 873 has a higher cooling rate than the second cooling section 873. This is achieved because the air guiding device 50, which is designed here as cooling fins 506, structurally controls or adjusts the volume flow of the cold air flow 62 to the cooling sections 872, 873. Correspondingly, the cooling fins 506 transport a larger volume flow of the cold air flow 62 to the first cooling section 872 than to the second cooling section 873. So that the user has the cooling effect of the first Cooling section 872 and the second cooling section 873, the first cooling section 872 and the second cooling section 873 have corresponding definitions as markings on the ceiling plate 85. The cold air flow 62 flowing or guided in the cold air duct 81 is discharged into the storage space 9 via the air outlets 95. For additional cooling of the stored goods placed on the storage area 87, an air outlet 75 can be integrated in the vertical cold air guide section 70. The cold air discharged from the air outlet 75 is directed to the storage area 87.

Reference symbol list

1

Household refrigerator

2nd

casing

3rd

Back wall

4th

Ceiling wall

5

first door

6

second door

7

partition wall

8th

Bottom wall

9

storage room

10th

Cold room

11

Freezer compartment

12

compressor

13

Control electronics

14

Storage compartment

15

Filing

16

Bearing shell

17th

Inner container

18th

Evaporator compartment

20th

Evaporator unit

21st

Fan

25th

Air damper

30th

Cold air return

40

Air outlet

45

pot

50

Air control device

503

local advantage

504

step

505

Tilt

506

Cooling fin

56

sensor

60

Cold air distribution system

62

Cold air flow

65

Cold air flow distributor

67

Rotary valve

68

Air damper

681

plate

682

Swivel axis

683

attack

70

vertical cold air duct section

71

Cold air duct

75

Air outlet

80

horizontal cold air duct section

81

Cold air duct

82

Cold air return

85

Ceiling tile

87

Storage area

871

mark

872

first storage area

873

second storage area

88

Flow path

90

Base plate

91

Thermal insulation layer

95

Air outlet

D1

first distance

D2

second distance

Claims (15)

Domestic refrigerator (1), comprising a cold air distribution system (60) arranged in a storage room (9), which has a vertical cold air duct section (70) and a horizontal cold air duct section (80), the horizontal cold air duct section (80) branching off from the vertical cold air duct section (70) , in the vertical cold air guide section (70) a cold air flow (62) along a rear wall (3) of the interior (9) in the height direction of the interior (9) is flowable and in the horizontal cold air guide section (80) the cold air flow (62) in the depth direction of the Interior (9) flowable, the horizontal cold air duct section (80) forms a cold air duct (81) in which the cold air flow (62) can flow through the horizontal cold air duct section (80), between a ceiling plate (85) and one with the ceiling plate (85) assembled base plate (90), the ceiling plate (85) having a storage area (87) for stored goods, w Elcher is formed from a heat-conducting material, characterized in that the storage area (87) is provided to provide a thermal bridge between the stored goods placed on the storage area (87) and the cold air flow (62) flowing in the cold air duct in the operating state of the horizontal cold air guide section (80) (81) to form. Domestic refrigeration appliance (1) according to claim 1, characterized in that the thermally conductive material of the storage area (87) has a higher coefficient of thermal conductivity than 10 W / (m ^∗ K). Domestic refrigeration appliance (1) according to claim 1 or 2, characterized in that the storage area (87) is formed from a more thermally conductive material than the majority of the base plate (90), preferably that the storage area (87) made of a metallic material or from Carbon-based material and the base plate (90) is formed from a non-metallic material. Domestic refrigeration appliance (1) according to one of the preceding claims, characterized in that the horizontal cold air duct section (80) is designed as an intermediate floor (15) for dividing the storage space (9) into a plurality of storage compartments (14). Domestic refrigeration appliance (1) according to one of the preceding claims, characterized in that thermal insulation (91) is arranged on the base plate (90) of the horizontal cold air duct section (80), which is preferably on the surface of the base plate (90) facing the cold air duct (81). is provided and preferably extends essentially over the entire surface of the base plate (90). Domestic refrigeration appliance (1) according to one of the preceding claims, characterized in that the cold air distribution system (60) has an adjustable cold air flow distributor (65) which is designed to direct the cold air flow (62) into the cold air duct (81) of the horizontal cold air guide section (80) to steer. Household refrigeration device (1) according to claim 6, characterized in that control electronics (13) of the household refrigeration device (1) are designed to adjust the adjustable cold air flow distributor (65) as a function of a sensor (56), in particular a temperature sensor, arranged in the horizontal cold air duct section (80) (56) to control. Household refrigeration device (1) according to claim 7, characterized in that the sensor (56), in particular temperature sensor, is arranged on the storage area (87) and is provided for sensing the temperature at a defined point of the storage area (87). Domestic refrigeration appliance (1) according to one of the preceding claims, characterized in that an air guiding device (50) arranged in the cold air duct (81) is provided to bring the cold air flow (62) into heat-conducting contact with the storage area (87). Household refrigeration device (1) according to claim 9, characterized in that the air guide device (50) is formed by a reduced in height flow cross-section of the cold air duct (81), the reduction in the flow cross-section by an inclination (505) or step (504) at the surface of the base plate (90) facing the cold air duct (81). Domestic refrigeration appliance (1) according to claim 9 or 10, characterized in that the air guiding device (50) is formed by a local projection (503) on the surface of the base plate (90) facing the cold air duct (81). Domestic refrigeration appliance (1) according to one of claims 9 to 11, characterized in that the air guiding device (50) is designed as a cooling fin (506) which extends elongated in the flow direction or transverse to the flow direction of the cold air flow (62) through the cold air duct (81), which is connected in a heat-conducting manner to the storage area (87) and projects into the cold air duct (81) in the direction of the base plate (90). Domestic refrigeration device (1) according to claim 12, characterized in that the cooling fin (506) defines a flow path (88) within the cold air duct (81), which is intended to direct the cold air flow (62) to a predefined area of the storage area (87) to lead. Domestic refrigeration appliance (1) according to one of the preceding claims, characterized in that the storage area (87) is locally fixed by a marking (871) on the ceiling plate (85). Domestic refrigeration appliance (1) according to one of the preceding claims, characterized in that a cold air return (82) to the vertical cold air duct section (70) is integrated in the horizontal cold air duct section (80).

Images