EP3667214A1 - Domestic refrigerator and method for fixing an evaporator for same - Google Patents
Domestic refrigerator and method for fixing an evaporator for same Download PDFInfo
- Publication number
- EP3667214A1 EP3667214A1 EP19213088.8A EP19213088A EP3667214A1 EP 3667214 A1 EP3667214 A1 EP 3667214A1 EP 19213088 A EP19213088 A EP 19213088A EP 3667214 A1 EP3667214 A1 EP 3667214A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- evaporator
- inner container
- conducting film
- adhesive layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- 239000012790 adhesive layer Substances 0.000 claims abstract description 79
- 230000001070 adhesive effect Effects 0.000 claims abstract description 54
- 239000000853 adhesive Substances 0.000 claims abstract description 52
- 238000005057 refrigeration Methods 0.000 claims abstract description 47
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 26
- 229920003051 synthetic elastomer Polymers 0.000 claims abstract description 25
- 239000005061 synthetic rubber Substances 0.000 claims abstract description 25
- 235000013305 food Nutrition 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 42
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
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- 238000004519 manufacturing process Methods 0.000 description 16
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- 239000004793 Polystyrene Substances 0.000 description 4
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- 238000009413 insulation Methods 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
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- 239000011496 polyurethane foam Substances 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/06—Walls
- F25D23/061—Walls with conduit means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/006—General constructional features for mounting refrigerating machinery components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
- F28F1/22—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means having portions engaging further tubular elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/02—Fastening; Joining by using bonding materials; by embedding elements in particular materials
- F28F2275/025—Fastening; Joining by using bonding materials; by embedding elements in particular materials by using adhesives
Definitions
- the invention relates to a household refrigerator with a receiving space for food, which is delimited by an inner container and can be tempered by at least one evaporator attached to a wall surface of the inner container.
- the invention also relates to a method for fastening an evaporator to a wall surface of an inner container.
- the DE 10 2007 048 830 A1 discloses a device for producing a refrigeration device which has a container and a tube which is helically wound around the container for guiding a refrigerant, with a holding means for clamping the container and a device for applying the tube to the outside of the container.
- the device has a pressure roller for an aluminum adhesive tape which is wrapped around the container before the tube is assembled.
- a butyl adhesive is provided as an adhesive for connecting the tube to the strip of aluminum wrapped around the inner container.
- the DE 697 09 232 T2 discloses a method for manufacturing evaporators for refrigeration machines, the evaporator having a hairpin coil with straight sections which are arranged between two metal sheets and are connected to them by means of an adhesive and by deforming at least one of the metal sheets.
- the US 7,124,602 B2 discloses a refrigerator with an evaporation tube, which is attached directly to the outside surfaces of an inner housing with an adhesive layer. Then the evaporator tube on the inner housing with a thermal insulation between Inner and outer case is covered. So that the evaporator tube can be stored and transported, the adhesive layer has a peel-off tape before mounting on the refrigerator.
- a household refrigeration device comprises a housing in which at least one receiving space for food is formed, which is delimited by an inner container and can be tempered by an evaporator attached to a wall surface of the inner container, the evaporator has an evaporator tube attached to a heat-conducting film by a first adhesive layer, wherein the first adhesive layer is formed from an adhesive based on acrylate or synthetic rubber.
- gluing In general, there is the advantage of gluing that no extreme conditions are necessary during the joining process or during the connection of the evaporator to the inner container. While in joining processes such. B. welding or soldering, the parts to be exposed to high temperatures and causing thermal changes in the material properties, gluing avoids such conditions, so that temperature-sensitive materials such as Polystyrene or polypropylene, can be added. This enables the evaporator to be attached to the inner container by gluing with simple means and without thermal treatment.
- pressure sensitive adhesives based on synthetic rubber are actually sensitive to low temperatures of less than minus 10 ° C and pressure sensitive adhesives based on acrylate actually have a weak initial adhesion, which has a particularly negative effect on the cycle time in the manufacturing process of a household refrigerator, the use of these pressure sensitive adhesives is for the Attaching an evaporator to an inner container in the area of household refrigerators is actually unusual.
- pressure-sensitive adhesives based on acrylate or synthetic rubber have a low coefficient of thermal conductivity, so that the use of these pressure-sensitive adhesives in a heat transfer area between the evaporator and the receiving space is actually unusual for stored goods in a household refrigeration device.
- An advantage of acrylate or synthetic rubber as an adhesive layer is, however, the high mechanical inherent strength, so that the heat-conducting film can be wetted with small layer thicknesses on the heat-conducting film. As a result, material costs and thus manufacturing costs can be significantly reduced.
- the adhesive which is based on acrylate or synthetic rubber, no longer has to be temperature-controlled prior to processing as a pressure-sensitive adhesive and has to be applied with high precision or with few tolerances as a bead or as a narrow strip on the inner container or on the evaporator tube. Since this is omitted according to the present invention, there is a simplified manufacturing process and thus a more cost-effective fastening of an evaporator to an inner container of a household refrigeration device.
- 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 compressor that is often located on the rear and regulated by a temperature controller.
- the cooling unit is a refrigeration machine that uses the physical effect of the heat of vaporization when the state of the unit changes from liquid to gaseous.
- a refrigerant which is moved in a closed cycle, experiences different physical state changes in succession.
- the gaseous refrigerant is first compressed by a cooling unit. It then condenses through the condenser, giving off heat.
- the liquid refrigerant is then expanded via a throttle, for example an expansion valve or a capillary tube, due to the pressure change.
- the refrigerant evaporates in the downstream evaporator while absorbing heat at a low temperature.
- the cycle can now start again.
- the process must be kept going from the outside by supplying mechanical work via the cooling unit.
- the refrigerant absorbs heat at a low temperature level, e.g. 5 ° C cold inside the refrigerator, and releases it to the environment with mechanical work at a higher temperature level, e.g. 35 ° C condensing temperature in the condenser on the rear of the refrigerator.
- Household refrigeration appliances are usually used for the storage of food.
- the lower temperature causes chemical reactions and biological processes, for example Food inedible and medication unusable, slow down.
- 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 “receiving space” is to be understood in particular to mean a space which is suitable for storing food and for arranging equipment elements and, if appropriate, cooling systems required for cooling the receiving space.
- An “inner container” is to be understood in particular as a boundary wall of the receiving space, which is preferably formed from polystyrene.
- the inner container of household refrigeration appliances is usually foamed with a thermal insulation made of rigid polyurethane foam.
- the wall surfaces of the inner container on which the evaporator is fastened are preferably foam-side wall surfaces of the inner container.
- Temporable should in particular be understood to be coolable or heatable.
- Thermally conductive film is to be understood in particular to mean a film which has heat-conducting properties and which has a very thin layer thickness.
- the heat-conducting film is processed into very thin layers by rolling and, in the technical sense, has a low bending stiffness.
- Thermally conductive films usually have a layer thickness of 2 ⁇ m to 200 ⁇ m.
- Evaporator is to be understood in particular as a component of a refrigeration cycle which extracts the heat from the storage space for stored goods.
- Evaporator tube is to be understood in particular as a tube through which refrigerant flows.
- the “evaporator” is preferably formed from an evaporator tube bent in a serpentine shape.
- “Acrylate” is to be understood in particular as an adhesive or pressure-sensitive adhesive which is largely insensitive to oxidation and UV radiation and has good aging and temperature resistance. Thanks to the polar side chains, “Acrylate” shows good adhesion to polar materials such as glass and metal. Since “acrylate” has a weak initial adhesion and an adequate adhesive effect only develops over a longer period of time, the use of an "acrylate” based adhesive is rare in the manufacturing industry due to the extension of the cycle time.
- Synthetic rubber is to be understood in particular as an adhesive which is distinguished by very high adhesive strengths under normal conditions and is particularly suitable for bonding non-polar materials, such as polyethylene, polypropylene or polystyrene.
- non-polar materials such as polyethylene, polypropylene or polystyrene.
- the “synthetic rubber” reacts sensitively to low temperatures of less than minus 10 ° C as well as to elevated temperatures of greater than 50 ° C, so that the application in the household refrigeration device area for the application of evaporators is surprising.
- the heat-conducting film may be a metal film, in particular an aluminum film. It is thereby achieved that the heat-conducting film functioning as a carrier layer has sufficient heat conductivity.
- a metal foil, in particular aluminum foil, enables very good heat transfer from the receiving space to the evaporator.
- the heat-conducting film on a first adhesive surface may be wetted over the entire surface by the first adhesive layer.
- the evaporator must be attached to the foam-side wall surface of the inner container with greater tolerances or with less precision in the manufacturing process.
- the manufacture of the household refrigeration device according to the invention with appropriate fastening of an evaporator can be implemented more cost-effectively and in terms of process technology.
- the complete wetting of the heat-conducting film with an adhesive layer results in better adhesion with the expanded polyurethane foam between the housing and the inner container.
- weaknesses in heat insulation or cavities in the rigid polyurethane foam can be avoided.
- the evaporator tube can have a first evaporator tube section and a second evaporator tube section running parallel to the first evaporator tube section, which are connected to one another in a heat-conducting manner by an integral cut of the heat-conducting film. It is thereby achieved that the heat-conducting film does not have to be attached to the inner container of the household refrigeration device in the form of a strip and in the longitudinal direction of the evaporator tube, but rather is glued to the inner container in large, one-piece blanks. Thus, several serpentine-shaped evaporator tube sections can be placed on the one-piece blank of the heat-conducting film.
- a further advantage is that the large-area heat transfer surface enables more efficient cooling of the receiving space and more efficient operation of the evaporator, and the one-piece cut of the heat-conducting film means that there are no heat transfer breaks in the heat-conducting film, as is the case with multi-piece adhesive strips arranged in parallel.
- the one-piece cut of the heat-conducting film essentially completely or at least mostly covers the at least one wall surface. This ensures that the cooling takes place over a large area or over the entire wall surface of the inner container. Due to the one-piece cutting of the heat-conducting film over a large wall area of the inner container, particularly efficient cooling of the receiving space can be achieved with simple means, since there are no heat transfer breaks in the heat-conducting film as with adhesive strips arranged in parallel.
- the one-piece cut of the heat-conducting film covers several wall surfaces of the inner container.
- the one-piece Cutting the heat-conducting film completely or at least mostly covers the several wall surfaces.
- the one-piece cut of the thermal foil preferably extends over an edge between the plurality of wall surfaces of the inner container and preferably covers this edge. This means that the cooling of the receiving space is possible with simple means over several wall surfaces.
- the one-piece blank extending over several wall surfaces of the inner container has no heat transfer bridges, so that the cooling of the receiving space or the operation of the evaporator is more efficient.
- the fastening of the evaporator or the manufacture of the household refrigeration device can be accelerated, since the heat-conducting film does not have to be placed in strips on the inner container.
- the evaporator tube can extend over several wall surfaces of the inner container. It is thereby achieved that the evaporator can extract the heat from the receiving space over several wall surfaces of the inner container. Accordingly, the evaporator can be operated more efficiently and the household refrigerator can be operated more energy-efficiently.
- the heat-conducting film can have a layer thickness of at most 100 ⁇ m, preferably a layer thickness of max. Have 50 microns. It is thereby achieved that the heat transfer between the receiving space and the evaporator tube is improved, since the layer thickness of the heat-conducting film and thus the heat-conducting resistance is very low. Accordingly, the cost of materials for the heat-conducting film is reduced and the evaporator can be operated more efficiently and the household refrigeration device can be operated more energy-efficiently.
- the first adhesive layer can have a layer thickness of 30 ⁇ m to 70 ⁇ m, preferably a layer thickness of 30 ⁇ m to 50 ⁇ m.
- the layer thickness of the adhesive layer is significantly less than that of a butyl adhesive layer.
- the pressure sensitive adhesive which is based on acrylate or synthetic rubber, has a high inherent strength, so that the heat-conducting film can be wetted with smaller layer thicknesses of the adhesive based on acrylate or synthetic rubber, and still have sufficient adhesion of the evaporator tube even at temperatures from -40 ° C to +10 ° C in the operating state of the evaporator.
- the lower layer thickness of the adhesive reduces the heat conduction resistance, which means that the evaporator can be operated more efficiently and the household refrigerator can be operated more efficiently.
- the heat-conducting film may be attached to the at least one wall surface of the inner container by means of a second adhesive layer which is formed on a second adhesive surface of the heat-conducting film and is formed from an adhesive based on acrylate or synthetic rubber.
- the second adhesive surface is preferably located on a surface of the heat-conducting film that is opposite the first adhesive surface.
- the identical adhesive namely an adhesive based on synthetic rubber or acrylate, can be used for the bonds between the heat-conducting film and the inner container as well as the heat-conducting film and the evaporator tube.
- the second adhesive layer can have a layer thickness of 30 ⁇ m to 70 ⁇ m, preferably a layer thickness of 30 ⁇ m to 40 ⁇ m. Since an adhesive based on acrylate or synthetic rubber has a very high inherent strength, the layer thicknesses can be chosen to be very thin. The lower layer thickness of the adhesive reduces the thermal conduction resistance, which means that the evaporator can be operated more efficiently and the household refrigerator can be operated more efficiently.
- the first adhesive layer and the second adhesive layer can have different layer thicknesses, preferably the layer thickness of the first adhesive layer can be greater than the layer thickness of the second adhesive layer. Since the adhesive connection between the evaporator tube and the heat-conducting film is exposed to greater mechanical stresses in the manufacturing process, it is advantageous to that the adhesive layer or first adhesive layer facing the evaporator tube has a greater layer thickness. On the other hand, the second adhesive layer or the adhesive layer facing the inner container can have a smaller layer thickness than the first adhesive layer, as a result of which the material and manufacturing costs can be further reduced.
- the heat conduction resistance can be reduced by a smaller layer thickness of the adhesive, as a result of which the evaporator can be operated more efficiently and the household refrigeration device can be operated more efficiently.
- the heat-conducting film with an applied first adhesive layer and an applied second adhesive layer and at least one cover film covering the first adhesive layer can form a preassembly unit. This ensures that the heat-conducting film can be prefabricated with the appropriate adhesive layers and a cover film before it is installed on the household refrigerator. This enables cost-effective production of the household refrigeration device equipped with the heat-conducting film.
- the evaporator tube can be attached in a longitudinally curved manner to the at least one wall surface of the inner container or wound helically around the inner container.
- the evaporator and the heat-conducting film connected to the evaporator tube by the first adhesive layer can form a preassembly unit.
- the evaporator is thus designed as a pre-assembled assembly unit or assembly. This has the advantage that the pre-assembled assembly unit or assembly can be manufactured in the pre-assembly and the assembly assembly only has to be attached to the inner container by the second adhesive layer when assembling the household refrigeration device.
- the refrigerant tube may have a straight wall section and a curved wall section, the straight wall section facing the inner container being connected to the heat-conducting film by the first adhesive layer and the curved wall section not being connected to the heat-conducting film by the first adhesive layer is.
- the method can include peeling off a cover film from the first adhesive layer.
- the one-piece blank can also cover substantially or at least the majority of several of the wall surfaces of the inner container.
- the evaporator can also consist of a plurality of evaporator tube sections 311, 312 which are connected to one another in a serpentine shape and which are pressed onto the one-piece blank 201 of the heat-conducting film 20, 22.
- the method according to the invention has the advantage that the evaporator is fastened is less complex compared to the prior art and thus the manufacturing process is easier and more efficient to implement.
- top, bottom, front, “back,” horizontal “,” vertical “,” depth direction “,” width direction “,” height direction “etc. 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.
- a household refrigerator 1 is provided with a housing 2 in which at least one receiving space 3 for food is formed.
- the receiving space 3 can be a freezer compartment 4 or a refrigerator compartment 5.
- the freezer compartment 4 preferably has temperatures of -14 to -18 ° C.
- the cooling space 5 preferably has temperatures of 2 ° C. to 8 ° C.
- the cooling space 5 can also be designed as a zero degree compartment, in which fish, meat or vegetables can usually be stored.
- the freezer compartment 4 has a freezer compartment door 9 with a freezer compartment door handle 10.
- An evaporator 6 is provided for cooling the freezer compartment 4.
- the first evaporator 6 is arranged on an outer wall of the first inner container 7 which faces the housing 2.
- the first evaporator 6 is thus arranged in the foam-side area of the household refrigeration device 1 and is foamed by a heat insulation foam.
- a receiving space 3 of the cooling space 5 is delimited by a second inner container 11 and has a second evaporator 12 in the area of the household refrigeration device 1 on the foam side.
- the cold room 5 has a cold room door 14 with a cold room door handle 15, which closes the receiving space 3 of the cold room 5. So that the first evaporator 6 and the second evaporator 12 can be supplied with refrigerant, the household refrigeration device has a machine room 13 with a compressor 8 arranged therein.
- the machine room 13 is formed by a machine room housing 16 in the rear area of the household refrigerator 1.
- FIG 2 a perspective view of an inner container 11 of the household refrigeration device 1 according to the invention is shown.
- the lower inner container 11 has a top surface 17, a bottom surface 18, a rear wall surface 19 and a side wall surface 21.
- the transitions between the wall surfaces 21, 17, 19 are designed as edges 29.
- a heat-conducting film 20, 22 is arranged on the rear wall surface 19 of the second inner container 11 and is used as a one-piece blank 201 on the rear wall surface 19 of the second inner container 11.
- the one-piece blank 201 has a tear-off edge 30 which forms the edge sections of the blank 201.
- the one-piece blank 201 of the heat-conducting film 20, 22 essentially completely covers the rear wall surface 19 of the second inner container, at least the blank 201 of the heat-conducting film 20, 22 covers the predominant or majority surface of the rear wall surface 19 of the second inner container 11.
- the first inner container 7 encloses one Freezer compartment 4.
- the first inner container 7 enclosing the freezer compartment 4 has a rear wall surface 19, a top wall surface 17, a bottom wall surface 18 and a side wall surface 21.
- the transitions between the wall surfaces 19, 17, 18 and 21 are designed as edges 29.
- a blank 201 of the heat-conducting film 20, 22 covers a top wall surface 17 and a rear wall surface 19 of the first inner container 7 surrounding the freezer compartment 4.
- the one-piece blank 201 of the heat-conducting foil 20, 22 essentially covers the entire top wall surface 17 and rear wall surface 19 of the freezer compartment 4 surrounding first inner container 7, at least the one-piece blank 201 of the heat-conducting film 20, 22 covers the predominant or majority of the surface of the top wall surface 17.
- the one-piece blank 201 of the heat-conducting film 20, 22 on the first inner container 7 extends over an edge 29 between the top wall surface 17 and the rear wall surface 19.
- FIG 3 a further perspective view of the inner container 7, 11 of the household refrigeration device 1 according to the invention is shown.
- the embodiment differs according to Figure 3 in that the second inner container 11 and the first inner container 7 are connected to one another in one piece.
- the one-piece blanks 201 of the first inner container 7 and the second inner container 11 are covered with evaporator tubes 31.
- the evaporator tubes 31 form a first evaporator 6 and a second evaporator 12.
- the first evaporator 6 and the second evaporator 12 can be two evaporators connected in parallel to one another or can be evaporators 6, 12 connected in series with one another.
- first evaporator 6 and the second evaporator 12 can be connected in series, but the second downstream evaporator 12 can be supplied directly with refrigerant by means of a refrigerant line or throttle line 35 bridging the first evaporator 6.
- the first evaporator 6 and the second evaporator 12 are connected in series or connected in succession in the direction of flow of the refrigerant.
- the throttle tube 35 injects the refrigerant pumped by the compressor 8 in the refrigerant circuit directly into the first evaporator 6. When the refrigerant has flowed through the first evaporator 6, it flows into the second downstream evaporator 12 of the cooling space 5.
- the first evaporator 6 is in contact with the Heat-conducting film 22 of the first inner container 7 and the second evaporator 12 are in contact with the heat-conducting film 20 of the second inner container 11. Because the heat-conducting film 20 covers almost the entire surface of the rear wall surface 19 of the second inner container 11 and the heat-conducting film 22 essentially the entire surface the back panel 19 and top panel 17 of the first Covered inner container 7, a large-scale and efficient cooling of the refrigerator 5 and the freezer 4 is possible.
- the evaporators 6, 12 each have a first straight evaporator tube section 311 and a second straight evaporator tube section 312.
- the first straight evaporator tube section 311 and the second straight evaporator tube section 312 are connected to one another in a heat-conducting manner by an integral blank 201. This has the advantage that a large-area and homogeneous removal of the heat from the cooling space 5 and the freezer space 4 is made possible.
- a heat exchange takes place between a suction pipe 46, in which the gaseous refrigerant flows off from the second evaporator 12, and the throttle pipe 35, which is referred to as the first heat exchanger section 47.
- the throttle tube 35 is in direct contact with the intake manifold 46.
- the warm throttle tube 35 can dissipate heat via the intake manifold 46 before entering an evaporator 6, 12, which increases the efficiency of the refrigerant circuit or the efficiency of the Evaporator 6, 12 can be further increased.
- a second heat exchanger section 48 is located between a further section of the throttle tube 35 and a connecting line 50 between the first evaporator 6 and the second evaporator 12.
- FIG 4 a sectional view of the inner container 7, 11 of the household refrigeration device 1 according to the invention is shown.
- the illustration shows that the cut 201 of the heat-conducting film 20, 22 extends from a first wall surface of the inner container 7, 11 via an edge 29 to a second wall surface of the inner container 7, 11.
- the blank 201 of the heat-conducting film 20, 22 is wetted with a first adhesive layer 26 in the direction of the refrigerant tube 31.
- the first adhesive layer 26 is provided for fastening the evaporator tube 31 of the evaporator 6, 12 to the inner container 7, 11 via the heat-conducting film 20, 22.
- the first adhesive layer 26 is formed from an adhesive based on acrylate or synthetic rubber.
- the one-piece blank 201 of the heat-conducting film 20, 22 is wetted in the direction of the inner container 7, 11 with a second adhesive layer 27.
- the second adhesive layer 27 is provided for attaching the heat-conducting film 20, 22 to the inner container 7, 11.
- the second adhesive layer 27 is formed from an adhesive based on acrylate or synthetic rubber.
- the one-piece blank is preferably 201 of the heat-conducting film 20, 22 is completely wetted with the first adhesive layer 26 on its surface facing the evaporator tube 31 and completely wetted with the second adhesive layer 27 on its surface facing the inner container 7, 11. This ensures sufficient adhesion to the inner container 7, 11 and to the evaporator tube 31.
- the evaporator tube 31 can be attached to the inner container 7, 11 in the manufacturing process with higher manufacturing tolerances, since a precise positioning of the evaporator tube 31 is not required. So that the one-piece blank 201 of the heat-conducting film 20, 22 can be pre-assembled, there is a cover film 28 on the surface of the heat-conducting film 20, 22 facing the evaporator tube. The cover film 28 is attached to the inner container 7, 11 or to the front of the evaporator tube 31 one-piece blank 201 of the heat-conducting film 20, 22 glued to the inner container 7, 11 is peeled off.
- FIG. 5 A further sectional view of the inner container 7, 11 with attached evaporator 6, 12 of the household refrigeration device 1 according to the invention is shown.
- the evaporator 6, 12 or the evaporator tube 31 has a first evaporator tube section 311 and a second evaporator tube section 312 running parallel to the first evaporator tube section 311.
- the first evaporator tube section 311 and the second evaporator tube section 312 are fastened to the inner container 7, 11 via a one-piece blank 201 of the heat-conducting film 20, 22, the one-piece blank 201 of the heat-conducting film 20, 22 being attached to a surface or first surface facing the evaporator tube sections 311, 312
- Adhesive surface 202 has a first adhesive layer 26 and a second adhesive layer 27 on a surface or second adhesive surface 203 facing the inner container 7, 11.
- the first adhesive layer 26 and the second adhesive layer 27 are formed from an adhesive based on acrylate or synthetic rubber.
- the one-piece blank 201 of the heat-conducting film 20, 22 is formed as large as possible, at least the first evaporator tube section 311 and the second evaporator tube section 312 are thermally conductively connected to one another by the one-piece blank 201 of the heat-conducting film 20, 22.
- the large, one-piece blank 201 of the heat-conducting film 20, 22 ensures that the largest possible cooling of the receiving space (not shown) by the evaporator 6, 12 can take place over the wall surfaces of the inner container 7, 11.
- the heat-conducting film 20 has 22 has a layer thickness D2 of at most 100 ⁇ m, preferably a layer thickness D2 of 40 ⁇ m to 50 ⁇ m.
- the first adhesive layer 27 has a layer thickness D3 of 30 ⁇ m to 70 ⁇ m, preferably a layer thickness D3 of 40 ⁇ m to 60 ⁇ m.
- the second adhesive layer 27 has a layer thickness D1 of 30 ⁇ m to 70 ⁇ m, preferably a layer thickness of 30 ⁇ m to 40 ⁇ m.
- the first adhesive layer 26 and the second adhesive layer 27 have different layer thicknesses D1, D3.
- the layer thickness D3 of the first adhesive layer 26 is greater than the layer thickness D1 of the second adhesive layer 27.
- the cut surface of the refrigerant pipe sections 311, 312 has a straight wall section and a curved wall section, the straight wall section 311a, 312a facing the inner container 7, 11 being connected to the heat-conducting film 20, 22 by the first adhesive layer 26 and the curved wall section 311b, 312b is not connected to the heat-conducting film 20, 22 by the first adhesive layer 26.
- the refrigerant pipe sections 311, 312 have according to Figure 5 no circular cross-section, but are squeezed at height H.
- the space between the housing wall 2 and the inner container 7, 11 is filled with a heat insulation foam 60, namely rigid polyurethane foam, for heat insulation of the household refrigeration device.
- FIG. 6 A flowchart with a method for fastening an evaporator 6, 12 to a wall surface 17, 18, 19, 21 of an inner container 7, 11 of the household refrigeration appliance 1 according to the invention is shown.
- step A an inner container 7, 11 with at least one wall surface 17, 18, 19, 21 is provided.
- step B a one-piece blank which can be covered essentially or at least mostly at least one wall surface 17, 18, 19, 21 of the inner container 7, 11 is formed
- Thermally conductive film 20, 22 is provided, which is wetted on a first adhesive surface 202 with a first adhesive layer 26 made of an adhesive based on acrylate or synthetic rubber and on a second adhesive surface 203 with a second adhesive layer 27 made of an adhesive based on acrylic or synthetic rubber.
- step C a wall surface 17, 18, 19, 21 of the inner container 6, 7 is completely or at least mostly covered with the one-piece blank 201 of the heat-conducting film 20, 22 and the one-piece blank 201 of the heat-conducting film 20, 22 is attached by means of the second adhesive layer 27 .
- step D the evaporator 6, 12 formed from an evaporator tube 31 is pressed onto the first adhesive layer 26 of the one-piece blank 201 of the heat-conducting film 20, 22.
- the evaporator can consist of a plurality of evaporator tube sections 311, 312 which are connected to one another in a serpentine shape and which are pressed onto the one-piece blank 201 of the heat-conducting film 20, 22.
- the method can include peeling off a cover film from the first adhesive layer.
- the one-piece blank 201 of the heat-conducting film 20, 22 can also cover substantially or at least the majority of several of the wall surfaces 17, 18, 19, 21 of the inner container 7, 11.
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Abstract
Haushaltskältegerät (1) mit einem Gehäuse (2) in dem zumindest ein Aufnahmeraum (3) für Lebensmittel ausgebildet ist, der durch einen Innenbehälter (7, 11) begrenzt ist und durch einen an mindestens einer Wandfläche (17, 18, 19, 21) des Innenbehälters (7, 11) befestigten Verdampfer (6, 12) temperierbar ist, der Verdampfer (6, 12) weist ein durch eine erste Klebschicht (26) an einer Wärmeleitfolie (20, 22) befestigtes Verdampferrohr (31) auf, wobei die erste Klebschicht (26) aus einem auf Acrylat oder auf Synthesekautschuk basierenden Haftmittel gebildet ist. Die Erfindung betrifft auch ein Verfahren zum Befestigen eines Verdampfers (6, 12) an mindestens einer Wandfläche (17, 18, 19, 21) eines Innenbehälters (7, 11). Household refrigeration device (1) with a housing (2) in which at least one receiving space (3) for food is formed, which is delimited by an inner container (7, 11) and by one on at least one wall surface (17, 18, 19, 21) of the inner container (7, 11) attached evaporator (6, 12) can be heated, the evaporator (6, 12) has an evaporator tube (31) attached to a heat-conducting film (20, 22) by a first adhesive layer (26), the first adhesive layer (26) is formed from an adhesive based on acrylate or on synthetic rubber. The invention also relates to a method for fastening an evaporator (6, 12) to at least one wall surface (17, 18, 19, 21) of an inner container (7, 11).
Description
Die Erfindung betrifft ein Haushaltskältegerät mit einem Aufnahmeraum für Lebensmittel, welcher durch einen Innenbehälter begrenzt ist und durch mindestens einen an einer Wandfläche des Innenbehälters befestigten Verdampfer temperierbar ist. Die Erfindung betrifft auch ein Verfahren zur Befestigung eines Verdampfers an einer Wandfläche eines Innenbehälters.The invention relates to a household refrigerator with a receiving space for food, which is delimited by an inner container and can be tempered by at least one evaporator attached to a wall surface of the inner container. The invention also relates to a method for fastening an evaporator to a wall surface of an inner container.
Die
Die
Die
Ein erfindungsgemäßes Haushaltskältegerät umfasst ein Gehäuse in dem zumindest ein Aufnahmeraum für Lebensmittel ausgebildet ist, der durch einen Innenbehälter begrenzt ist und durch einen an einer Wandfläche des Innenbehälters befestigten Verdampfer temperierbar ist, der Verdampfer weist ein durch eine erste Klebschicht an einer Wärmeleitfolie befestigtes Verdampferrohr auf, wobei die erste Klebschicht aus einem auf Acrylat oder auf Synthesekautschuk basierenden Haftmittel gebildet ist.A household refrigeration device according to the invention comprises a housing in which at least one receiving space for food is formed, which is delimited by an inner container and can be tempered by an evaporator attached to a wall surface of the inner container, the evaporator has an evaporator tube attached to a heat-conducting film by a first adhesive layer, wherein the first adhesive layer is formed from an adhesive based on acrylate or synthetic rubber.
Im Allgemeinen besteht bei einer Klebung der Vorteil, dass keine extremen Bedingungen während des Fügeprozesses bzw. während der Anbindung des Verdampfers an den Innenbehälter notwendig sind. Während bei Fügeprozessen, wie z. B. Schweißen oder Löten, die Fügeteile hohen Temperaturen ausgesetzt sind und thermische Veränderungen der Materialeigenschaften bewirken, vermeidet Kleben solche Bedingungen, so dass auch temperatursensible Werkstoffe, wie z.B. Polystyrol oder Polypropylen, gefügt werden können. Dadurch ist ermöglicht, dass der Verdampfer durch Kleben mit einfachen Mitteln und ohne thermische Behandlung an dem Innenbehälter befestigt werden kann.In general, there is the advantage of gluing that no extreme conditions are necessary during the joining process or during the connection of the evaporator to the inner container. While in joining processes such. B. welding or soldering, the parts to be exposed to high temperatures and causing thermal changes in the material properties, gluing avoids such conditions, so that temperature-sensitive materials such as Polystyrene or polypropylene, can be added. This enables the evaporator to be attached to the inner container by gluing with simple means and without thermal treatment.
Da Haftklebstoffe auf Basis von Synthesekautschuk eigentlich empfindlich auf tiefe Temperaturen von kleiner minus 10 °C reagieren und Haftklebstoffe auf Basis von Acrylat eigentlich eine schwache Anfangshaftung aufweisen, was sich besonders negativ auf die Taktzeit im Fertigungsprozess eines Haushaltskältegeräts auswirkt, ist die Anwendung dieser Haftklebstoffe für die Befestigung eines Verdampfers an einem Innenbehälter im Haushaltskältegerätebereich eigentlich ungewöhnlich. Darüber hinaus weisen Haftklebstoffe auf Basis von Acrylat oder Synthesekautschuk einen geringen Wärmeleitkoeffizienten auf, so dass die Anwendung dieser Haftklebstoffe in einem Wärmeübergangsbereich zwischen Verdampfer und Aufnahmeraum für Lagergut eines Haushaltskältegeräts eigentlich ungewöhnlich.Since pressure sensitive adhesives based on synthetic rubber are actually sensitive to low temperatures of less than minus 10 ° C and pressure sensitive adhesives based on acrylate actually have a weak initial adhesion, which has a particularly negative effect on the cycle time in the manufacturing process of a household refrigerator, the use of these pressure sensitive adhesives is for the Attaching an evaporator to an inner container in the area of household refrigerators is actually unusual. In addition, pressure-sensitive adhesives based on acrylate or synthetic rubber have a low coefficient of thermal conductivity, so that the use of these pressure-sensitive adhesives in a heat transfer area between the evaporator and the receiving space is actually unusual for stored goods in a household refrigeration device.
Ein Vorteil von Acrylat oder Synthesekautschuk als Klebschicht ist allerdings die hohe mechanische Eigenfestigkeit, so dass die Benetzung der Wärmeleitfolie mit geringen Schichtdicken auf die Wärmeleitfolie erfolgen kann. Dadurch können Materialkosten und somit die Fertigungskosten wesentlich reduziert werden.An advantage of acrylate or synthetic rubber as an adhesive layer is, however, the high mechanical inherent strength, so that the heat-conducting film can be wetted with small layer thicknesses on the heat-conducting film. As a result, material costs and thus manufacturing costs can be significantly reduced.
Ein weiterer Vorteil ergibt sich dadurch, dass das auf Acrylat oder Synthesekautschuk basierende Haftmittel nicht mehr vor der Verarbeitung als Haftkleber aufwändig temperiert und mit hoher Präzision bzw. wenig Toleranzen als Raupe oder als schmaler Streifen auf den Innenbehälter oder auf das Verdampferrohr aufgetragen werden muss. Da dies gemäß vorliegender Erfindung entfällt, ergibt sich ein vereinfachter Fertigungsprozess und somit eine kostengünstigere Befestigung eines Verdampfers an einen Innenbehälter eines Haushaltskältegeräts.Another advantage results from the fact that the adhesive, which is based on acrylate or synthetic rubber, no longer has to be temperature-controlled prior to processing as a pressure-sensitive adhesive and has to be applied with high precision or with few tolerances as a bead or as a narrow strip on the inner container or on the evaporator tube. Since this is omitted according to the present invention, there is a simplified manufacturing process and thus a more cost-effective fastening of an evaporator to an inner container of a household refrigeration device.
Unter einem "Haushaltskältegerät" soll insbesondere ein schrankförmiges Gerät verstanden werden, das üblicherweise elektrisch betrieben wird und die Temperatur in seinem Inneren selbständig niedrig hält. Mittels eines häufig an der Rückseite befindlichen und per Temperaturregler geregelten Verdichters wird das Kühlschrankinnere gekühlt. Das Kühlaggregat ist eine Kältemaschine, die den physikalischen Effekt der Verdampfungswärme bei Wechsel des Aggregatzustandes von flüssig zu gasförmig nutzt. Ein Kältemittel, das in einem geschlossenen Kreislauf bewegt wird, erfährt nacheinander verschiedene Aggregatzustandsänderungen. Das gasförmige Kältemittel wird zunächst durch ein Kühlaggregat komprimiert. Im Folgenden durch den Verflüssiger kondensiert es unter Wärmeabgabe. Anschließend wird das flüssige Kältemittel aufgrund der Druckänderung über eine Drossel, zum Beispiel ein Expansionsventil oder ein Kapillarrohr, entspannt. Im nachgeschalteten Verdampfer verdampft das Kältemittel unter Wärmeaufnahme bei niedriger Temperatur. Der Kreislauf kann nun von vorne beginnen. Der Prozess muss von außen durch Zufuhr von mechanischer Arbeit über das Kühlaggregat in Gang gehalten werden. Das Kältemittel nimmt eine Wärmeleistung auf einem niedrigen Temperaturniveau, zum Beispiel 5 °C kalter Kühlschrankinnenraum, auf und gibt sie unter Zuführung von mechanischer Arbeit auf einem höheren Temperaturniveau an die Umgebung ab, zum Beispiel 35 °C Verflüssigungstemperatur im Verflüssiger auf der Kühlschrankrückseite. Haushaltskältegeräte finden üblicherweise Verwendung für die Lagerung von Nahrungsmitteln. Durch die niedrigere Temperatur laufen chemische Reaktionen und biologische Prozesse, die beispielsweise Lebensmittel ungenießbar und Medikamente unbrauchbar werden lassen, langsamer ab. Die üblichen Betriebstemperaturen im Innern von Haushaltskältegeräten liegen in Kühlräumen zwischen plus 2 °C und plus 8 °C, bei Gefrierräumen zwischen minus 14 °C und minus 18 °C und bei Nullgrad-Fächern zwischen minus 2 °C und plus 4 °C. Das Gehäuse der Kühlfächer ist wärmegedämmt, um den Energieaufwand zur Erhaltung der Differenz zur Umgebungstemperatur niedrig zu halten.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 compressor that is often located on the rear and regulated by a temperature controller. The cooling unit is a refrigeration machine that uses the physical effect of the heat of vaporization when the state of the unit changes from liquid to gaseous. A refrigerant, which is moved in a closed cycle, experiences different physical state changes in succession. The gaseous refrigerant is first compressed by a cooling unit. It then condenses through the condenser, giving off heat. The liquid refrigerant is then expanded via a throttle, for example an expansion valve or a capillary tube, due to the pressure change. The refrigerant evaporates in the downstream evaporator while absorbing heat at a low temperature. The cycle can now start again. The process must be kept going from the outside by supplying mechanical work via the cooling unit. The refrigerant absorbs heat at a low temperature level, e.g. 5 ° C cold inside the refrigerator, and releases it to the environment with mechanical work at a higher temperature level, e.g. 35 ° C condensing temperature in the condenser on the rear of the refrigerator. Household refrigeration appliances are usually used for the storage of food. The lower temperature causes chemical reactions and biological processes, for example Food inedible and medication unusable, slow down. 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.
Unter einem "Aufnahmeraum" soll insbesondere ein Raum verstanden werden, welcher für die Lagerung von Lebensmitteln sowie zur Anordnung von Ausstattungselementen und ggf. von zur Kühlung des Aufnahmeraums erforderlichen Kältesystemen geeignet ist.A “receiving space” is to be understood in particular to mean a space which is suitable for storing food and for arranging equipment elements and, if appropriate, cooling systems required for cooling the receiving space.
Unter einem "Innenbehälter" soll insbesondere eine Begrenzungswand des Aufnahmeraums verstanden werden, welcher vorzugsweise aus Polystyrol gebildet ist. Der Innenbehälter bei Haushaltskältegeräten ist üblicherweise mit einer Wärmeisolation aus Polyurethanhartschaumstoff umschäumt. Die Wandflächen des Innenbehälters, auf denen der Verdampfer befestigt ist, sind vorzugsweise schaumseitige Wandflächen des Innenbehälters.An “inner container” is to be understood in particular as a boundary wall of the receiving space, which is preferably formed from polystyrene. The inner container of household refrigeration appliances is usually foamed with a thermal insulation made of rigid polyurethane foam. The wall surfaces of the inner container on which the evaporator is fastened are preferably foam-side wall surfaces of the inner container.
Unter "temperierbar soll insbesondere kühlbar oder erwärmbar verstanden werden."Temperable" should in particular be understood to be coolable or heatable.
Unter "Wärmeleitfolie" soll insbesondere eine Folie verstanden werden, die wärmeleitende Eigenschaften aufweist und die eine sehr dünne Schichtdicke aufweist. Die Wärmeleitfolie wird durch Walzen zu sehr dünnen Schichten verarbeitet und weist im fachmännischen Sinne eine niedrige Biegesteifigkeit auf. Üblicherweise weisen Wärmeleitfolien eine Schichtdicke von 2 µm bis 200 µm.“Thermally conductive film” is to be understood in particular to mean a film which has heat-conducting properties and which has a very thin layer thickness. The heat-conducting film is processed into very thin layers by rolling and, in the technical sense, has a low bending stiffness. Thermally conductive films usually have a layer thickness of 2 μm to 200 μm.
Unter "Verdampfer" soll insbesondere ein Bestandteil eines Kältekreislaufs verstanden werden, der dem Aufnahmeraum für Lagergut die Wärme entzieht.“Evaporator” is to be understood in particular as a component of a refrigeration cycle which extracts the heat from the storage space for stored goods.
Unter "Verdampferrohr" soll insbesondere ein mit Kältemittel durchflossenes Rohr verstanden werden. Der "Verdampfer" ist vorzugsweise aus einem serpentinenförmig gebogenen Verdampferrohr gebildet.“Evaporator tube” is to be understood in particular as a tube through which refrigerant flows. The "evaporator" is preferably formed from an evaporator tube bent in a serpentine shape.
Unter "Acrylat" soll insbesondere ein Haftmittel bzw. Haftklebstoff verstanden werden, der durch weitgehende Unempfindlichkeit im Hinblick auf Oxidation sowie UV-Strahlung und gute Alterungs- und Temperaturbeständigkeit auszeichnet. Durch die polaren Seitenketten zeigt "Acrylat" eine gute Adhäsion auf polaren Werkstoffen, wie zum Beispiel Glas und Metall. Da "Acrylat" eine schwache Anfangshaftung aufweist und erst über einen längeren Zeitraum eine ausreichende Haftwirkung sich einstellt, ist die Anwendung von einem auf "Acrylat" basierenden Haftmittel in der verarbeitenden Industrie aufgrund der Verlängerung der Taktzeit selten.“Acrylate” is to be understood in particular as an adhesive or pressure-sensitive adhesive which is largely insensitive to oxidation and UV radiation and has good aging and temperature resistance. Thanks to the polar side chains, "Acrylate" shows good adhesion to polar materials such as glass and metal. Since "acrylate" has a weak initial adhesion and an adequate adhesive effect only develops over a longer period of time, the use of an "acrylate" based adhesive is rare in the manufacturing industry due to the extension of the cycle time.
Unter "Synthesekautschuk" soll insbesondere ein Haftmittel verstanden werden, der sich durch sehr hohe Klebkräfte unter Normalbedingungen auszeichnet und sich besonders zum Kleben von unpolaren Werkstoffen, wie zum Beispiel Polyethylen, Polypropylen oder Polystyrol, eignet. Allerdings ist die Temperatur- und Altersbeständigkeit eher durchschnittlich. Der "synthetische Kautschuk" reagiert empfindlich auf tiefe Temperaturen von kleiner minus 10 °C sowie auf erhöhte Temperaturen von größer plus 50 °C, so dass die Anwendung im Haushaltskältegerätebereich für die Applikation von Verdampfern überraschend ist."Synthetic rubber" is to be understood in particular as an adhesive which is distinguished by very high adhesive strengths under normal conditions and is particularly suitable for bonding non-polar materials, such as polyethylene, polypropylene or polystyrene. However, the temperature and age resistance is rather average. The "synthetic rubber" reacts sensitively to low temperatures of less than
Vorteilhafte Ausführungsformen und Weiterbildungen ergeben sich aus den Unteransprüchen sowie aus der Beschreibung unter Bezugnahme auf die Figuren.Advantageous embodiments and further developments result from the subclaims and from the description with reference to the figures.
Gemäß einer Ausgestaltung der Erfindung kann es sein, dass die Wärmeleitfolie eine Metallfolie, insbesondere eine Aluminiumfolie, ist. Dadurch ist erreicht, dass die als Trägerschicht fungierende Wärmeleitfolie eine ausreichende Wärmeleitfähigkeit aufweist. Durch eine Metallfolie, insbesondere Aluminiumfolie, ist ein sehr guter Wärmeübergang vom Aufnahmeraum zum Verdampfer möglich.According to one embodiment of the invention, the heat-conducting film may be a metal film, in particular an aluminum film. It is thereby achieved that the heat-conducting film functioning as a carrier layer has sufficient heat conductivity. A metal foil, in particular aluminum foil, enables very good heat transfer from the receiving space to the evaporator.
Gemäß einer Ausgestaltung der Erfindung kann es sein, dass die Wärmeleitfolie an einer ersten Klebfläche vollflächig durch die erste Klebschicht benetzt ist. Dadurch ist erreicht, dass der Verdampfer im Fertigungsprozess mit größeren Toleranzen bzw. mit geringerer Präzision an der schaumseitigen Wandfläche des Innenbehälters angebracht werden muss. Mit der Möglichkeit der Befestigung des Verdampferrohrs mit größeren Toleranzen bzw. mit geringerer Präzision an einem Innenbehälter des Haushaltskältegeräts, ist die Fertigung des erfindungsgemäßen Haushaltskältegerätes mit entsprechender Befestigung eines Verdampfers kostengünstiger und prozesstechnisch einfacher realisierbar. Darüber hinaus ergibt sich durch die vollständige Benetzung der Wärmeleitfolie mit einer Klebeschicht eine bessere Anhaftung mit dem zwischen dem Gehäuse und dem Innenbehälter expandierten Polyurethanhartschaumstoff. Entsprechend können Wärmeisolationsschwächen bzw. Lunker im Polyurethanhartschaumstoff vermieden werden.According to one embodiment of the invention, the heat-conducting film on a first adhesive surface may be wetted over the entire surface by the first adhesive layer. This means that the evaporator must be attached to the foam-side wall surface of the inner container with greater tolerances or with less precision in the manufacturing process. With the possibility of fastening the evaporator tube with greater tolerances or with less precision to an inner container of the household refrigeration device, the manufacture of the household refrigeration device according to the invention with appropriate fastening of an evaporator can be implemented more cost-effectively and in terms of process technology. In addition, the complete wetting of the heat-conducting film with an adhesive layer results in better adhesion with the expanded polyurethane foam between the housing and the inner container. Correspondingly, weaknesses in heat insulation or cavities in the rigid polyurethane foam can be avoided.
Gemäß einer Ausgestaltung der Erfindung kann das Verdampferrohr einen ersten Verdampferrohrabschnitt und einen parallel zum ersten Verdampferrohrabschnitt verlaufenden zweiten Verdampferrohrabschnitt aufweisen, welche durch einen einstückigen Zuschnitt der Wärmeleitfolie wärmeleitend miteinander verbunden sind. Dadurch ist erreicht, dass die Wärmeleitfolie nicht streifenförmig und in Längsrichtung des Verdampferrohrs auf den Innenbehälter des Haushaltskältegerätes befestigt werden muss, sondern in großflächigen einstückigen Zuschnitten auf den Innenbehälter geklebt wird. Somit können mehrere serpentinenförmige Verdampferrohrabschnitte auf dem einstückigen Zuschnitt der Wärmeleitfolie platziert werden.
Ein weiterer Vorteil ist, dass durch die großflächig realisierte Wärmeübergangsfläche eine effizientere Abkühlung des Aufnahmeraums sowie effizienterer Betrieb des Verdampfers möglich ist und durch den einstückigen Zuschnitt der Wärmeleitfolie keine Wärmeübergangsbrüche in der Wärmeleitfolie, wie dies bei parallel angeordneten, mehrstückigen Klebestreifen der Fall ist, vorliegen.According to one embodiment of the invention, the evaporator tube can have a first evaporator tube section and a second evaporator tube section running parallel to the first evaporator tube section, which are connected to one another in a heat-conducting manner by an integral cut of the heat-conducting film. It is thereby achieved that the heat-conducting film does not have to be attached to the inner container of the household refrigeration device in the form of a strip and in the longitudinal direction of the evaporator tube, but rather is glued to the inner container in large, one-piece blanks. Thus, several serpentine-shaped evaporator tube sections can be placed on the one-piece blank of the heat-conducting film.
A further advantage is that the large-area heat transfer surface enables more efficient cooling of the receiving space and more efficient operation of the evaporator, and the one-piece cut of the heat-conducting film means that there are no heat transfer breaks in the heat-conducting film, as is the case with multi-piece adhesive strips arranged in parallel.
Gemäß einer Ausgestaltung der Erfindung kann es sein, dass der einstückige Zuschnitt der Wärmeleitfolie im Wesentlichen vollständig oder zumindest mehrheitlich die mindestens eine Wandfläche bedeckt. Dadurch ist erreicht, dass die Abkühlung großflächig bzw. über die gesamte Wandfläche des Innenbehälters erfolgt. Durch den einstückigen Zuschnitt der Wärmeleitfolie über eine große Wandfläche des Innenbehälters kann eine besonders effiziente Kühlung des Aufnahmeraums mit einfachen Mitteln realisiert werden, da es keine Wärmeübergangsbrüche in der Wärmeleitfolie wie bei parallel angeordneten Klebestreifen gibt.According to an embodiment of the invention, it may be that the one-piece cut of the heat-conducting film essentially completely or at least mostly covers the at least one wall surface. This ensures that the cooling takes place over a large area or over the entire wall surface of the inner container. Due to the one-piece cutting of the heat-conducting film over a large wall area of the inner container, particularly efficient cooling of the receiving space can be achieved with simple means, since there are no heat transfer breaks in the heat-conducting film as with adhesive strips arranged in parallel.
Gemäß einer Ausgestaltung der Erfindung kann es sein, dass der einstückige Zuschnitt der Wärmeleitfolie mehrere Wandflächen des Innenbehälters bedeckt. Der einstückige Zuschnitt der Wärmeleitfolie bedeckt die mehreren Wandflächen vollständig oder zumindest mehrheitlich. Der einstückige Zuschnitt der Wärmeleifolie erstreckt sich vorzugsweise über eine Kante zwischen den mehreren Wandflächen des Innenbehälters und bedeckt vorzugsweise diese Kante. Dadurch ist erreicht, dass die Kühlung des Aufnahmeraums über mehrere Wandflächen mit einfachen Mitteln möglich ist. Darüber hinaus weist der über mehrere Wandflächen des Innenbehälters sich erstreckende einstückige Zuschnitt keine Wärmeübergangsbrücken auf, so dass die Abkühlung des Aufnahmeraums bzw. der Betrieb des Verdampfers effizienter ist. Durch die Belegung des einstückigen Zuschnitts der Wärmeleitfolie über mehrere Wandflächen des Innenbehälters kann die Befestigung des Verdampfers bzw. die Herstellung des Haushaltskältegeräts beschleunigt werden, da die Wärmeleitfolie nicht streifenförmig auf den Innenbehälter platziert werden muss.According to one embodiment of the invention, it may be that the one-piece cut of the heat-conducting film covers several wall surfaces of the inner container. The one-piece Cutting the heat-conducting film completely or at least mostly covers the several wall surfaces. The one-piece cut of the thermal foil preferably extends over an edge between the plurality of wall surfaces of the inner container and preferably covers this edge. This means that the cooling of the receiving space is possible with simple means over several wall surfaces. In addition, the one-piece blank extending over several wall surfaces of the inner container has no heat transfer bridges, so that the cooling of the receiving space or the operation of the evaporator is more efficient. By covering the one-piece cut of the heat-conducting film over several wall surfaces of the inner container, the fastening of the evaporator or the manufacture of the household refrigeration device can be accelerated, since the heat-conducting film does not have to be placed in strips on the inner container.
Gemäß einer Ausgestaltung der Erfindung kann sich das Verdampferrohr über mehrere Wandflächen des Innenbehälters erstrecken. Dadurch ist erreicht, dass der Verdampfer dem Aufnahmeraum über mehrere Wandflächen des Innenbehälters die Wärme entziehen kann. Entsprechend kann der Verdampfer effizienter bzw. das Haushaltskältegerät energieeffizienter betrieben werden.According to one embodiment of the invention, the evaporator tube can extend over several wall surfaces of the inner container. It is thereby achieved that the evaporator can extract the heat from the receiving space over several wall surfaces of the inner container. Accordingly, the evaporator can be operated more efficiently and the household refrigerator can be operated more energy-efficiently.
Gemäß einer Ausgestaltung der Erfindung kann die Wärmeleitfolie eine Schichtdicke von maximal 100 µm aufweisen, vorzugsweise eine Schichtdicke von max. 50 µm aufweisen. Dadurch ist erreicht, dass der Wärmeübergang zwischen Aufnahmeraum und Verdampferrohr verbessert ist, da die Schichtdicke der Wärmeleitfolie und somit der Wärmeleitungswiderstand sehr niedrig ist. Entsprechend ist der Materialaufwand der Wärmeleitfolie reduziert und der Verdampfer effizienter bzw. das Haushaltskältegeräts energieeffizienter betrieben werden.According to one embodiment of the invention, the heat-conducting film can have a layer thickness of at most 100 μm, preferably a layer thickness of max. Have 50 microns. It is thereby achieved that the heat transfer between the receiving space and the evaporator tube is improved, since the layer thickness of the heat-conducting film and thus the heat-conducting resistance is very low. Accordingly, the cost of materials for the heat-conducting film is reduced and the evaporator can be operated more efficiently and the household refrigeration device can be operated more energy-efficiently.
Gemäß einer Ausgestaltung der Erfindung kann die erste Klebschicht eine Schichtdicke von 30 µm bis 70 µm aufweisen, vorzugsweise eine Schichtdicke von 30 µm bis 50 µm aufweisen. Dadurch ist erreicht, dass die Schichtdicke der Klebschicht gegenüber einer Butylklebschicht wesentlich geringer ist. Der aus einem auf Acrylat oder Synthesekautschuk basierende Haftklebstoff weist eine hohe Eigenfestigkeit auf, so dass die Wärmeleitfolie mit geringeren Schichtdicken des auf Acrylat oder Synthesekautschuk basierenden Haftmittel benetzt werden kann und trotzdem eine ausreichende Anhaftung des Verdampferrohrs auch bei Temperaturen von -40 °C bis +10 °C im Betriebszustand des Verdampfers gegeben ist. Durch die geringere Schichtdicke des Haftmittels ist der Wärmeleitungswiderstand reduziert, wodurch der Verdampfer effizienter bzw. das Haushaltskältegerät effizienter betrieben werden kann.According to one embodiment of the invention, the first adhesive layer can have a layer thickness of 30 μm to 70 μm, preferably a layer thickness of 30 μm to 50 μm. This means that the layer thickness of the adhesive layer is significantly less than that of a butyl adhesive layer. The pressure sensitive adhesive, which is based on acrylate or synthetic rubber, has a high inherent strength, so that the heat-conducting film can be wetted with smaller layer thicknesses of the adhesive based on acrylate or synthetic rubber, and still have sufficient adhesion of the evaporator tube even at temperatures from -40 ° C to +10 ° C in the operating state of the evaporator. The lower layer thickness of the adhesive reduces the heat conduction resistance, which means that the evaporator can be operated more efficiently and the household refrigerator can be operated more efficiently.
Gemäß einer Ausgestaltung der Erfindung kann es sein, dass die Wärmeleitfolie an der mindestens einen Wandfläche des Innenbehälters über eine an einer zweiten Klebefläche der Wärmeleitfolie ausgebildeten zweiten Klebschicht befestigt ist, welche aus einem auf Acrylat oder auf Synthesekautschuk basierenden Haftmittel gebildet ist. Vorzugsweise befindet sich die zweite Klebfläche auf einer zur ersten Klebfläche gegenüberlichen Fläche der Wärmeleitfolie. Dadurch ergibt sich der Vorteil, dass die Wärmeleitfolie auf beiden Seiten des einstückigen Zuschnitts der Wärmeleitfolie mit dem identischen Klebstoff benetzt werden kann. Ein auf Acrylat oder auf Synthesekautschuk basierender Klebstoff weist sowohl gute Klebeeigenschaften zwischen Metallen, wie Aluminium und Stahl, wie auch zwischen einem aus Polystyrol gefertigten Innenbehälter und einer aus Aluminium gebildeten Wärmeleitfolie auf. Dadurch ergibt sich der Vorteil, dass die Materialvielfalt und somit Komplexität in der Fertigung reduziert werden kann. Für die Klebungen zwischen Wärmeleitfolie und Innenbehälter sowie Wärmeleitfolie und Verdampferrohr kann der identische Klebstoff, nämlich ein auf synthetischer Kautschuk oder Acrylat basierender Klebstoff, verwendet werden.According to one embodiment of the invention, the heat-conducting film may be attached to the at least one wall surface of the inner container by means of a second adhesive layer which is formed on a second adhesive surface of the heat-conducting film and is formed from an adhesive based on acrylate or synthetic rubber. The second adhesive surface is preferably located on a surface of the heat-conducting film that is opposite the first adhesive surface. This has the advantage that the heat-conducting film can be wetted with the identical adhesive on both sides of the one-piece cut of the heat-conducting film. An adhesive based on acrylate or synthetic rubber has good adhesive properties between metals such as aluminum and steel, as well as between an inner container made of polystyrene and a heat-conducting film made of aluminum. This has the advantage that the variety of materials and thus complexity in production can be reduced. The identical adhesive, namely an adhesive based on synthetic rubber or acrylate, can be used for the bonds between the heat-conducting film and the inner container as well as the heat-conducting film and the evaporator tube.
Gemäß einer Ausgestaltung der Erfindung kann die zweite Klebschicht eine Schichtdicke von 30 µm bis 70 µm aufweisen, vorzugsweise eine Schichtdicke von 30 µm bis 40 µm aufweisen. Da ein auf Acrylat oder auf Synthesekautschuk basierendes Haftmittel eine sehr hohe Eigenfestigkeit aufweist, können die Schichtdicken sehr dünn gewählt werden. Durch die geringere Schichtdicke des Haftmittels ist der Wärmeleitungswiderstand reduziert, wodurch der Verdampfer effizienter bzw. das Haushaltskältegerät effizienter betrieben werden kann.According to one embodiment of the invention, the second adhesive layer can have a layer thickness of 30 μm to 70 μm, preferably a layer thickness of 30 μm to 40 μm. Since an adhesive based on acrylate or synthetic rubber has a very high inherent strength, the layer thicknesses can be chosen to be very thin. The lower layer thickness of the adhesive reduces the thermal conduction resistance, which means that the evaporator can be operated more efficiently and the household refrigerator can be operated more efficiently.
Gemäß einer Ausgestaltung der Erfindung kann die erste Klebschicht und die zweite Klebschicht unterschiedliche Schichtdicken aufweisen, vorzugsweise kann die Schichtdicke der ersten Klebschicht größer als die Schichtdicke der zweiten Klebschicht sein. Da die Klebverbindung zwischen dem Verdampferrohr und der Wärmeleitfolie größeren mechanischen Spannungen im Fertigungsprozess ausgesetzt ist, ist es von Vorteil, dass die dem Verdampferrohr zugewandte Klebschicht bzw. erste Klebschicht eine größere Schichtdicke aufweist. Hingegen kann die zweite Klebschicht bzw. die dem Innenbehälter zugewandte Klebschicht mit einer geringeren Schichtdicke als die erste Klebschicht aufweisen, wodurch die Material- und Fertigungskosten weiter reduziert werden können.According to one embodiment of the invention, the first adhesive layer and the second adhesive layer can have different layer thicknesses, preferably the layer thickness of the first adhesive layer can be greater than the layer thickness of the second adhesive layer. Since the adhesive connection between the evaporator tube and the heat-conducting film is exposed to greater mechanical stresses in the manufacturing process, it is advantageous to that the adhesive layer or first adhesive layer facing the evaporator tube has a greater layer thickness. On the other hand, the second adhesive layer or the adhesive layer facing the inner container can have a smaller layer thickness than the first adhesive layer, as a result of which the material and manufacturing costs can be further reduced.
Darüber hinaus kann durch eine geringere Schichtdicke des Haftmittels der Wärmeleitungswiderstand reduziert werden, wodurch der Verdampfer effizienter bzw. das Haushaltskältegerät effizienter betrieben werden kann.In addition, the heat conduction resistance can be reduced by a smaller layer thickness of the adhesive, as a result of which the evaporator can be operated more efficiently and the household refrigeration device can be operated more efficiently.
Gemäß einer Ausgestaltung der Erfindung kann die Wärmeleitfolie mit aufgebrachter erster Klebschicht und aufgebrachter zweiter Klebschicht und zumindest einer die erste Klebschicht abdeckenden Abdeckfolie eine Vormontageeinheit ausbilden. Dadurch ist erreicht, dass die Wärmeleitfolie mit den entsprechenden Klebschichten und einer Abdeckfolie vorgefertigt werden kann, bevor diese am Haushaltskältegerät verbaut werden. Dadurch ist eine kostengünstige Fertigung des mit der Wärmeleitfolie ausgestatteten Haushaltskältegeräts möglich.According to one embodiment of the invention, the heat-conducting film with an applied first adhesive layer and an applied second adhesive layer and at least one cover film covering the first adhesive layer can form a preassembly unit. This ensures that the heat-conducting film can be prefabricated with the appropriate adhesive layers and a cover film before it is installed on the household refrigerator. This enables cost-effective production of the household refrigeration device equipped with the heat-conducting film.
Gemäß einer Ausgestaltung der Erfindung kann das Verdampferrohr in seiner Längserstreckung meänderförmig gebogen an der mindestens einen Wandfläche des Innenbehälters befestigt sein oder um den Innenbehälter schraubenförmig gewickelt sein. Dadurch ist der Vorteil erreicht, dass die erfindungsgemäße Verdampferbefestigung für eine Vielzahl von Verdampfertypen verwendet werden kann und somit die Komplexität in der Fertigung reduziert ist.According to one embodiment of the invention, the evaporator tube can be attached in a longitudinally curved manner to the at least one wall surface of the inner container or wound helically around the inner container. This has the advantage that the evaporator attachment according to the invention can be used for a large number of evaporator types and thus the complexity in production is reduced.
Gemäß einer Ausgestaltung der Erfindung kann der Verdampfer und die durch die erste Klebschicht mit dem Verdampferrohr verbundene Wärmeleitfolie eine Vormontageeinheit ausbilden. Der Verdampfer ist somit als vorkonfektionierte Montageinheit bzw. - baugruppe ausgebildet. Dadurch ist der Vorteil erreicht, dass die vorkonfektionierte Montageeinheit bzw. -baugruppe in der Vormontage gefertigt werden kann und die Montagebaugruppe nur noch durch die zweite Klebschicht am Innenbehälter beim Zusammenbau des Haushaltskältegerätes befestigt werden muss.According to one embodiment of the invention, the evaporator and the heat-conducting film connected to the evaporator tube by the first adhesive layer can form a preassembly unit. The evaporator is thus designed as a pre-assembled assembly unit or assembly. This has the advantage that the pre-assembled assembly unit or assembly can be manufactured in the pre-assembly and the assembly assembly only has to be attached to the inner container by the second adhesive layer when assembling the household refrigeration device.
Gemäß einer Ausgestaltung der Erfindung kann es sein, dass das Kältemittelrohr einen geraden Wandabschnitt und einen gekrümmten Wandabschnitt aufweist, wobei der dem Innenbehälter zugewandte gerade Wandabschnitt durch die erste Klebschicht mit der Wärmeleitfolie verbunden ist und der gekrümmte Wandabschnitt nicht durch die erste Klebschicht mit der Wärmeleitfolie verbunden ist. Dadurch ist der Vorteil erreicht, dass durch die Ausbildung eines geraden Wandabschnitts eine größere Klebefläche sowie Wärmeübergangsfläche zwischen Wärmeleitfolie und Verdampferrohr vorliegt. Entsprechend ist dadurch die Anhaftung des Verdampferrohrs verbessert und der Verdampfer kann effizienter bzw. das Haushaltskältegerät kann energieeffizienter betrieben werden.According to one embodiment of the invention, the refrigerant tube may have a straight wall section and a curved wall section, the straight wall section facing the inner container being connected to the heat-conducting film by the first adhesive layer and the curved wall section not being connected to the heat-conducting film by the first adhesive layer is. This has the advantage that the formation of a straight wall section provides a larger adhesive surface and a heat transfer surface between the heat-conducting film and the evaporator tube. Accordingly, the adhesion of the evaporator tube is improved and the evaporator can be operated more efficiently or the household refrigeration device can be operated more energy-efficiently.
Die Erfindung umfasst auch ein Verfahren zum Befestigen eines Verdampfers an einem Haushaltskältegerät, umfassend die Verfahrensschritte:
- A) Bereitstellen eines Innenbehälters mit mindestens einer Wandfläche
- B) Bereitstellen eines im Wesentlichen vollständig oder zumindest mehrheitlich die mindestens eine Wandfläche des Innenbehälters abdeckbaren einstückigen Zuschnitts einer Wärmeleitfolie, welcher an einer ersten Klebfläche mit einer ersten Klebschicht aus einem auf Acrylat oder Synthesekautschuk basierenden Haftmittel und an einer zweiten Klebfläche mit einer zweiten Klebschicht aus einem auf Acrylat oder Synthesekautschuk basierenden Haftmittel benetzt ist;
- C) Vollständiges oder zumindest mehrheitliches Bedecken einer Wandfläche des Innenbehälters mit dem einstückigen Zuschnitt der Wärmeleitfolie und Anhaften mittels der zweiten Klebschicht; und
- D) Andrücken des aus einem Verdampferrohr gebildeten Verdampfers auf die erste Klebschicht des einstückigen Zuschnitts der Wärmeleitfolie.
- A) Providing an inner container with at least one wall surface
- B) Providing an essentially completely or at least mostly one-piece blank of a heat-conducting film that can cover the at least one wall surface of the inner container, said blank being provided on a first adhesive surface with a first adhesive layer made of an adhesive based on acrylate or synthetic rubber and on a second adhesive surface with a second adhesive layer made of an adhesive adhesive wetted on acrylate or synthetic rubber;
- C) Complete or at least majority covering of a wall surface of the inner container with the one-piece cutting of the heat-conducting film and adhering by means of the second adhesive layer; and
- D) pressing the evaporator formed from an evaporator tube onto the first adhesive layer of the one-piece blank of the heat-conducting film.
Zwischen Schritt C und D kann das Verfahren das Abziehen von einer Abdeckfolie von der ersten Klebschicht aufweisen. Natürlich kann der einstückige Zuschnitt auch mehrere der Wandflächen des Innenbehälters im Wesentlichen vollständig oder zumindest mehrheitlich bedecken. Der Verdampfer kann auch aus einer Vielzahl von serpentinenförmig miteinander verbundenen Verdampferrohrabschnitten 311, 312 bestehen, welche auf den einstückigen Zuschnitt 201 der Wärmeleitfolie 20, 22 aufgedrückt werden. Das erfindungsgemäße Verfahren hat den Vorteil, dass die Befestigung des Verdampfers im Vergleich zum Stand der Technik weniger komplex ist und somit der Fertigungsprozess einfacher und effizienter umsetzbar ist.Between steps C and D, the method can include peeling off a cover film from the first adhesive layer. Of course, the one-piece blank can also cover substantially or at least the majority of several of the wall surfaces of the inner container. The evaporator can also consist of a plurality of
Mit Angaben "oben", "unten", "vorne", "hinten, "horizontal", "vertikal", "Tiefenrichtung", "Breitenrichtung", "Höhenrichtung" etc. sind die bei bestimmungsgemäßen Gebrauch und bestimmungsgemäßem Anordnen des Geräts und bei einem dann insbesondere vor dem Gerät stehenden und in Richtung des Geräts blickenden Beobachter gegebenen Positionen und Orientierungen angegeben.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.
Weitere Merkmale der Erfindung ergeben sich aus den Ansprüchen, den Figuren und der Figurenbeschreibung. Die vorstehend in der Beschreibung genannten Merkmale und Merkmalskombinationen, sowie die nachfolgend in der Figurenbeschreibung genannten und/oder in den Figuren alleine gezeigten Merkmale und Merkmalskombinationen sind nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen verwendbar, ohne den Rahmen der Erfindung zu verlassen. Es sind somit auch Ausführungen von der Erfindung als umfasst und offenbart anzusehen, die in den Figuren nicht explizit gezeigt und erläutert sind, jedoch durch separierte Merkmalskombinationen aus den erläuterten Ausführungen hervorgehen und erzeugbar sind. Es sind auch Ausführungen und Merkmalskombinationen als offenbart anzusehen, die somit nicht alle Merkmale eines ursprünglich formulierten unabhängigen Anspruchs aufweisen. Es sind darüber hinaus Ausführungen und Merkmalskombinationen, insbesondere durch die oben dargelegten Ausführungen, als offenbart anzusehen, die über die in den Rückbezügen der Ansprüche dargelegten Merkmalskombinationen hinausgehen oder abweichen.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.
Die beschriebenen Ausgestaltungen und Weiterbildungen lassen sich beliebig miteinander kombinieren.The embodiments and further developments described can be combined with one another as desired.
Weitere mögliche Ausgestaltungen, Weiterbildungen und Implementierungen der Erfindung umfassen auch nicht explizit genannte Kombinationen von zuvor oder im Folgenden bezüglich der Ausführungsbeispiele beschriebenen Merkmale der Erfindung.Further possible refinements, developments and implementations of the invention also include combinations of features of the invention described above or below with reference to the exemplary embodiments that are not explicitly mentioned.
Die beiliegenden Zeichnungen sollen ein weiteres Verständnis der Ausführungsformen der Erfindung vermitteln. Sie veranschaulichen Ausführungsformen und dienen im Zusammenhang mit der Beschreibung der Erklärung von Prinzipien und Konzepten der Erfindung.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.
Andere Ausführungsformen und viele der genannten Vorteile ergeben sich im Hinblick auf die Zeichnungen. Die dargestellten Elemente der Zeichnungen sind nicht notwendigerweise maßstabsgetreu zueinander gezeigt.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.
Ausführungsbeispiele der Erfindung werden nachfolgend anhand schematischer Zeichnungen näher erläutert. Es zeigen:
- Fig. 1
- eine perspektivische Ansicht eines erfindungsgemäßen Haushaltskältegeräts;
- Fig. 2
- eine perspektivische Ansicht eines Innenbehälters des erfindungsgemäßen Haushaltskältegeräts;
- Fig. 3
- eine weitere perspektivische Ansicht des Innenbehälters des erfindungsgemäßen Haushaltskältegeräts;
- Fig. 4
- eine Schnittansicht des Innenbehälters des erfindungsgemäßen Haushaltskältegerät;
- Fig. 5
- eine weitere Schnittansicht des Innenbehälters des erfindungsgemäßen Haushaltskältegerät;
- Fig. 6
- ein Flussdiagramm mit einem Verfahren zum Befestigen eines Verdampfers an mindestens einer Wandfläche eines Innenbehälters des erfindungsgemäßen Haushaltskältegeräts.
- Fig. 1
- a perspective view of a household refrigerator according to the invention;
- Fig. 2
- a perspective view of an inner container of the household refrigerator according to the invention;
- Fig. 3
- another perspective view of the inner container of the household refrigerator according to the invention;
- Fig. 4
- a sectional view of the inner container of the household refrigerator according to the invention;
- Fig. 5
- another sectional view of the inner container of the household refrigerator according to the invention;
- Fig. 6
- a flowchart with a method for attaching an evaporator to at least one wall surface of an inner container of the household refrigeration device according to the invention.
In den Figuren werden gleiche oder funktionsgleiche Elemente mit den gleichen Bezugszeichen versehen.Identical or functionally identical elements are provided with the same reference symbols in the figures.
In
In
In
Zwischen einem Saugrohr 46, in dem das gasförmige Kältemittel vom zweiten Verdampfer 12 abfließt, und dem Drosselrohr 35 findet ein Wärmeaustausch statt, welcher als erster Wärmetauscherabschnitt 47 bezeichnet ist. Dazu befindet sich das Drosselrohr 35 in direkter Anlage mit dem Saugrohr 46. Dadurch ist erreicht, dass das warme Drosselrohr 35 vor Eintritt in einen Verdampfer 6, 12 über das Saugrohr 46 Wärme abführen kann, wodurch sich der Wirkungsgrad des Kältemittelkreislaufs bzw. die Effizienz der Verdampfer 6, 12 weiter steigern lässt. Ein zweiter Wärmetauscherabschnitt 48 befindet sich zwischen einem weiteren Abschnitt des Drosselrohrs 35 und einer Verbindungsleitung 50 zwischen dem ersten Verdampfer 6 und dem zweiten Verdampfer 12.A heat exchange takes place between a
in
In
Die Schnittfläche der Kältemittelrohrabschnitte 311, 312 weist einen geraden Wandabschnitt und einen gekrümmten Wandabschnitt auf, wobei der dem Innenbehälter 7, 11 zugewandte gerade Wandabschnitt 311a, 312a durch die erste Klebschicht 26 mit der Wärmeleitfolie 20, 22 verbunden ist und der gekrümmte Wandabschnitt 311b, 312b nicht durch die erste Klebschicht 26 mit der Wärmeleitfolie 20, 22 verbunden ist. Die Kältemittelrohrabschnitte 311, 312 weisen gemäß
In
Claims (15)
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DE102018221407.7A DE102018221407A1 (en) | 2018-12-11 | 2018-12-11 | Household refrigeration device and method of mounting an evaporator therefor |
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EP3667214A1 true EP3667214A1 (en) | 2020-06-17 |
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EP19213088.8A Pending EP3667214A1 (en) | 2018-12-11 | 2019-12-03 | Domestic refrigerator and method for fixing an evaporator for same |
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2018
- 2018-12-11 DE DE102018221407.7A patent/DE102018221407A1/en active Pending
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2019
- 2019-12-03 EP EP19213088.8A patent/EP3667214A1/en active Pending
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DE69709232T2 (en) | 1996-05-06 | 2002-07-18 | Whirlpool Corp., Benton Harbor | Process for the production of evaporators for refrigeration circuits, and the manufactured evaporator |
DE19850013A1 (en) * | 1998-10-30 | 2000-05-04 | Kme Schmoele Gmbh | Heat-exchange plate element comprizes wide-perforated base layer and pipe register fixed in place by covering heat-conductive film joined via peforations to adhesive film on far side of base. |
US7124602B2 (en) | 2003-01-29 | 2006-10-24 | Lg Electronics Inc. | Direct cooling type refrigerator and evaporating pipe fixing method in the refrigerator |
DE102007048830A1 (en) | 2007-10-11 | 2009-04-16 | BSH Bosch und Siemens Hausgeräte GmbH | Device for producing a refrigeration device |
CN102967089A (en) * | 2012-12-17 | 2013-03-13 | 合肥美的荣事达电冰箱有限公司 | Plate-tube evaporator applied to refrigerator, manufacturing method thereof and refrigerator |
DE102013203534A1 (en) * | 2013-03-01 | 2014-09-04 | BSH Bosch und Siemens Hausgeräte GmbH | Evaporator for e.g. household refrigerator, has refrigerant pipe whose specific portion which is bonded to base plate via adhesive is limited with another portion that is adhered to base plate via tighter adhesive |
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