EP4073440A1 - Haushaltskältegerät - Google Patents
HaushaltskältegerätInfo
- Publication number
- EP4073440A1 EP4073440A1 EP20808366.7A EP20808366A EP4073440A1 EP 4073440 A1 EP4073440 A1 EP 4073440A1 EP 20808366 A EP20808366 A EP 20808366A EP 4073440 A1 EP4073440 A1 EP 4073440A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- refrigerant pipe
- straight
- refrigerant
- wing
- wall surface
- 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.)
- Withdrawn
Links
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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
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- 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
- F28F1/16—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 being integral with the element, e.g. formed by extrusion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
- F25B2339/023—Evaporators consisting of one or several sheets on one face of which is fixed a refrigerant carrying coil
Definitions
- the present invention relates to a household refrigerator with a wing tube evaporator in a receiving space for food.
- WO 2009/068979 discloses a heat exchanger with wing tubes.
- the object is to specify a household refrigeration appliance with an improved wing tube evaporator which has an improved structure when used in household refrigeration appliances.
- a household refrigerator with a heat-insulated housing in which at least one receiving space for food and refrigeration components is formed, which is delimited by an inner container arranged in the housing between the receiving space and a thermal insulation, with one inside the receiving space facing the receiving space Wall surface of the inner container a freely hanging wing tube evaporator is arranged for cooling the receiving space
- the wing tube evaporator comprises a meandering, refrigerant pipe coil, when the household refrigeration device is in operation, refrigerant pipe coil with a plurality of refrigerant pipe straight, which are each connected to one another by refrigerant pipe bends, with the refrigerant pipe straight extending radially outward , wherein the wing tube evaporator has a flat design and the refrigerant tube straight lines are essentially continuous next to one another are arranged along the wall surface of the receiving space.
- the wall surface is preferably opposite a door of the receiving space.
- a household refrigerator is understood in particular to be a household appliance, i.e. a refrigeration device that is used for housekeeping in households or in the catering sector, and in particular is used to store food and / or beverages at certain temperatures, such as a refrigerator, a freezer, a A fridge-freezer, a freezer or a wine fridge.
- wing tube evaporators are better suited for food when they are arranged within a receiving space or in an evaporator chamber of the household refrigerator that is separated from the storage chamber, since this completely dispenses with adhesive bonds such as butyl or hotmelt.
- adhesive bonds such as butyl or hotmelt.
- tube-on-sheet evaporators such adhesive connections are common for fastening the refrigerant pipes to a metal plate.
- wing tube evaporators in household refrigeration appliances can be more cost-effective compared to evaporators usually used in a receiving space of the household refrigeration appliance, such as, for example, tube-on-sheet evaporators, lamellar evaporators or roll-bond evaporators. Since with a wing tube evaporator the expensive metal plate to support the refrigerant tubes, as with a "tube-on-sheet" evaporator, or metal layers placed on top of one another, between which the refrigerant paths are formed by inflation, as with a roll-bond evaporator, is not necessary Blade tube evaporator in flat design can be manufactured in a structurally simple and inexpensive manner and is particularly suitable for use in the household refrigeration appliance sector.
- Another advantage of the present invention can be that the wing tube evaporator takes up less storage volume of the receiving space than a lamellar evaporator with a rather deep design due to the flat design and continuously adjacent arrangement along the wall surface of the receiving space, and the storage capacity for stored goods in the receiving space is increased, at least better is usable.
- wing tube evaporators is also particularly advantageous when they are arranged in the receiving space or in the storage chamber or in an evaporator chamber of the domestic refrigeration appliance that is separated from the storage chamber, since the appliance does not Corrosion protection measures, such as anti-oxidation coating, can be used.
- flat design is understood to mean a wing tube evaporator, the dimensions of which are kept particularly narrow in the depth direction of the receiving space. More precisely, it is provided that immediately adjacent straight refrigerant pipe lines of the wing tube evaporator in the depth direction of the receiving space are not arranged or supported one above the other, but are arranged essentially continuously adjacent along the wall surface of the receiving space.
- two directly spatially adjacent straight refrigerant pipe lines of the wing tube evaporator do not have a common point of intersection with a surface normal of the wall surface or the dimensions of two directly adjacent refrigerant pipe straight lines are arranged completely apart from one another.
- two adjacent straight refrigerant pipe lines of the wing tube evaporator are not located one above the other, but are always lined up next to one another along the wall surface of the receiving space on which the wing tube evaporator of the household refrigerator according to the invention is arranged.
- a “freely hanging wing tube evaporator” is understood to mean a wing tube evaporator which is mounted, positioned or suspended on a wall surface facing the receiving space.
- the “freely hanging wing tube evaporator” should also advantageously not rest on a horizontal wall surface.
- the straight refrigerant pipe lines are arranged horizontally in their longitudinal extension in the receiving space. Accordingly, the straight refrigerant pipe lines are arranged spatially next to one another vertically in the receiving space. Because the cold air mass flow generated by a fan and flowing vertically in the receiving space flows orthogonally to the longitudinal axis of the refrigerant pipe straight line, an efficient heat exchange between the wing tube evaporator and the air mass flow is possible. The air mass flow generated by the fan accordingly flows in a top-to-bottom or a bottom-to-top direction in an evaporator chamber accommodating the wing tube evaporator when the domestic refrigerator is set up for operation.
- the wings of refrigerant pipe straight lines following one another in the flow direction of the refrigerant each define virtual wing planes which are inclined differently relative to the wall surface.
- a first straight refrigerant pipe has a first wing plane and a following, in particular immediately following, second straight refrigerant pipe in the flow direction of the first straight refrigerant pipe has a second wing plane, the first wing plane at a first angle of 90 ° relative to the wall surface ⁇ 180 ° and the second wing plane are arranged relative to the wall surface at a second angle of 0 ° ⁇ ⁇ 90 °.
- At least two straight refrigerant pipe lines that follow one another in the direction of flow of the refrigerant are arranged offset from one another. Because the straight refrigerant pipe lines are arranged at different distances from the wall surface, the straight refrigerant pipe lines are directly washed around by means of the air mass flow generated by a fan, which improves the efficient heat exchange or air-refrigerant pipe heat transfer of the wing tube evaporator when used in a domestic refrigeration appliance.
- the straight refrigerant pipe lines of the wing tube evaporator are arranged together on a plane parallel to the wall surface, the majority of the refrigerant tube straight lines are in the slipstream of the air mass flow or are sealed off by the first flushed refrigerant tube line, which reduces the air-refrigerant tube heat transfer or heat exchange efficiency of the wing tube evaporator.
- the offset arrangement also allows a flat design, so that the wing tube evaporator has a depth of preferably five tube diameters, particularly preferably three Having tube diameters of the refrigerant tube straight line of the wing tube evaporator.
- the distances between the refrigerant pipe lines are large enough for a good flow and the offset arrangement forces the air mass flow to swirl, which results in better air-refrigerant pipe heat transfer.
- the second refrigerant pipe straight following a first refrigerant pipe straight in the flow direction of the refrigerant in the wing tube evaporator has a smaller distance to the wall surface than the first refrigerant pipe straight and one of the second refrigerant pipe straight in the flow direction of the refrigerant flowing through the refrigerant pipe loop has a larger distance again Distance than the second refrigerant pipe straight to the wall surface.
- the refrigerant pipe bend has a plurality of radially protruding wing segments on its one outer and / or one inner radius. Because the refrigerant pipe bends are also covered with wing segments, the heat exchange surface or heat exchange efficiency of the wing tube evaporator increases and the operation of the household refrigerator is more energetic. Because the blades are segmented in the area of the refrigerant pipe bends, the refrigerant pipe bends can be bent into shape more easily or the vane pipe evaporator can be easily manufactured. Furthermore, the plurality of wing segments can be materially separated from one another by an incision.
- the incision on the inner radius can be cut out in a V-shape before the bending process of the refrigerant pipe bend, whereby the bending of the refrigerant pipe bends on the inside radius is easier to manufacture, since the segments on the inside radius cannot tilt into one another.
- the first wing section and / or the second wing section is materially uninterrupted both on the straight refrigerant pipe as well as on the refrigerant pipe bend.
- One advantage of that is that the wing tube evaporator experiences essentially no reduction in heat exchange efficiency and is still easy to manufacture. Because the segmentation of the wing sections on the refrigerant tube bends is omitted, the wing tube evaporator can be manufactured with fewer process steps.
- the refrigerant pipe bend has a bending angle of essentially 180 ° and is designed in the shape of a loop. Because the refrigerant pipe bend is loop-shaped or three-dimensional, namely bent in height, depth and transverse direction, the wings or wing sections protruding radially from the refrigerant pipe coil can run continuously or without interruption along the refrigerant pipe coil, making the manufacture of the wing tube evaporator less complex . Due to the loop-shaped refrigerant pipe bends, the refrigerant pipe coil with the radially protruding blades can be bent in a serpentine shape without further intermediate processing steps in the manufacture of the wing tube evaporator, e.g. segmenting the blades on the refrigerant tube bend.
- the cross section of the refrigerant pipe in the area of the refrigerant pipe loop is twisted or rotated about a central axis of the refrigerant pipe compared to the cross section of the refrigerant pipe in the area of the refrigerant pipe straight line.
- a prefabricated refrigerant tube usually rolled up on a roll, with radially protruding blades can be used in an advantageous manner to produce the meandering structure of the wing tube evaporator, whereby this can be bent in a simple manner in order to provide a wing tube evaporator with little manufacturing effort, which in the area of the refrigerant pipe straight, which form the predominant area of the wing tube evaporator, allow an air-refrigerant pipe heat transfer and wherein the conventionally production-intensive refrigerant pipe bends can be manufactured easily and inexpensively.
- two straight refrigerant pipe lines that are spatially directly adjacent to one another are always arranged offset from one another.
- two straight refrigerant pipe lines that are spatially adjacent to one another are not arranged one above the other, but always next to one another relative to the wall surface.
- the two straight refrigerant pipe lines should advantageously be spatially immediately adjacent to one another.
- all straight refrigerant pipe lines or at least the majority of the straight refrigerant pipe lines have essentially the same distance from the wall surface.
- This has the advantage that the wing tube evaporator is particularly slim, viewed in the depth direction of the receiving space, and requires little installation space.
- the wing tube evaporator takes up only little installation space, as a result of which the wing tube evaporator takes away only insignificant storage volume for stored goods in the receiving space.
- a flat wing tube evaporator can also be clad more easily and also appears inconspicuous to the user of the household refrigeration appliance according to the invention when looking at the receiving space.
- an evaporator chamber is provided in the receiving space, in which the wing tube evaporator is placed, and the evaporator chamber is separated from a storage chamber for food by a partition.
- a fan is provided for circulating cold air between the evaporator chamber and the storage chamber, which fan generates an air mass flow along the wall surface.
- the straight refrigerant pipe lines are structurally connected to one another via a web which defines an air gap between these two straight refrigerant pipe lines.
- the vane has a first vane section protruding radially in a first direction from the refrigerant pipe line and a second vane section projecting radially from the refrigerant pipe line in a direction deviating from the first vane section in a materially bonded manner
- the first and the second wing section are integrally connected to the straight refrigerant pipe and are located apart from an axis of symmetry, parallel to the first wing section and the second wing section, of a cross-sectional area of the straight refrigerant pipe section.
- the blades can also be laid flat directly on one of the wall surfaces and the wing tube evaporator can be attached to one of the panels by means of a fastening, for example a screw, rivet, hook or weld Wall surfaces of the inner container can be easily attached via the wings.
- the straight refrigerant pipe extends on a wall surface that is parallel to the wall surface facing the receiving space virtual plane.
- a first subset of the refrigerant pipe straight line is located on a vertically in the receiving space, along a first virtual plane running parallel to the wall surface, and a second subset of the refrigerant pipe straight on a vertical in the receiving space, along a second virtual plane running parallel to the wall surface Level is located, wherein the virtual planes have a different spatial distance relative to the wall surface. Since the straight refrigerant pipe lines are offset from one another relative to the wall surface of the receiving space, the refrigerant pipe heat exchange efficiency of the wing tube evaporator increases. The subsets of the straight refrigerant pipe are offset from one another in such a way that the air mass flow can flow around the individual straight refrigerant pipes as directly as possible when the domestic refrigeration appliance is in operation.
- the first wing section and the second wing section are materially uninterrupted in the longitudinal extension of the straight refrigerant pipe. This has the advantage that the air-refrigerant tube heat exchange or heat exchange efficiency of the wing tube evaporator is increased and the wing tube evaporator can be easily manufactured.
- Figure 1 shows a side sectional view of the household refrigerator according to the invention.
- Figure 2 shows schematically an exemplary refrigerant circuit of the household refrigerator according to the invention.
- Figure 3 shows a perspective view of a first embodiment of the wing tube evaporator of the household refrigerator according to the invention.
- FIG. 4 shows a perspective view of a second embodiment of the wing tube evaporator of the household refrigerator according to the invention.
- Figure 5 shows a perspective view of a third embodiment of the wing tube evaporator of the household refrigerator according to the invention.
- FIG. 6 shows a schematic sectional view of one of the embodiments of the wing tube evaporator according to FIGS. 3 to 5 of the household refrigerator according to the invention.
- FIG. 7 shows a schematic sectional view of a modified one
- FIG. 8 shows a schematic sectional view of a further modified embodiment of the wing tube evaporator according to FIGS. 3 to 5 of the household refrigerator according to the invention.
- FIGS. 9a-9g show sectional views of straight refrigerant pipe lines
- FIG. 1 shows a side sectional view of the household refrigerator 1 according to the invention.
- the household refrigerator 1 comprises a housing 2 in which a receiving space 7 is formed, which can be tempered or cooled by a freely suspended wing tube evaporator 50.
- the receiving space 7 is delimited by an inner container 3 and an inner door 6 of a door 4.
- a foamed thermal insulation 10 for example rigid polyurethane foam.
- the thermal insulation 10 is provided to significantly reduce the heat input into the receiving space 7 due to the warmer environment.
- the receiving space 7 is divided by a partition 14 into a storage chamber 12 and an evaporator chamber 13.
- shelves 8 for example glass plates, are arranged, which define storage compartments 9 for placing refrigerated items.
- the storage chamber 12 can be designed as a freezing chamber for deep-freezing frozen goods at approximately minus 18 degrees Celsius.
- the storage chamber 12 can also be provided as a cooling chamber for frost-free cooling of items to be cooled, preferably at temperatures between plus 4 and plus 8 degrees Celsius.
- the storage chamber 15 can specifically be designed as a zero-degree compartment, in particular for keeping fruit or vegetables fresh, or as a multifunctional compartment with storage conditions of below 0 degrees Celsius and above 0 degrees Celsius or, more precisely, the temperature range of for example minus 18 degrees Celcius to plus 14 degrees Celcius can be displayed. In this way, adapted storage conditions can be set or made available for the most varied types of refrigerated goods, which correspond to an optimal cooling characteristic of the stored goods.
- wing tube evaporator 50 for cooling the receiving space 7 or the storage chamber 12, which is attached to a wall surface 16 or rear wall of the inner container 3 by means of evaporator fastenings 15, such as screws, hooks, and retaining protrusions.
- the wing tube evaporator 50 is arranged parallel to the wall surface 16 or rear wall of the receiving space 7 and is located on a first virtual plane E1 which is parallel to the wall surface 16 and is at a distance A from the wall surface 16.
- the distance A between the dimensions of the wing tube evaporator 50 and the wall surface 16 is preferably in a range from 5 mm to 50 mm.
- a fan 11 for example an axial fan or radial fan, is also provided for circulating air mass between the evaporator chamber 5 and the storage chamber 12 or the fan 11 can generate an air mass flow (not shown) along the wall surface 16 via the tubular vane evaporator 50.
- FIG 2 an exemplary refrigerant circuit 20 of the household refrigerator 1 according to the invention is shown schematically.
- the household refrigerator 1 has a compressor 21 known per se, from the outlet of which a high pressure section 201 of a refrigerant circuit 20 begins.
- the high-pressure section 201 comprises a pressure line 23 which runs from the compressor 21 to a condenser 24, a condenser pipe discharge line 25 which runs from the condenser 24 to a dryer 26.
- a downstream refrigerant pipe discharge 31, in particular a capillary pipe, emanating from the dryer 26 forms a transition to a low-pressure section 202 of the refrigerant circuit 20.
- This low-pressure section 16 comprises a stop valve 27 in the flow direction of the refrigerant, which can completely open or shut off the refrigerant flow in the refrigerant circuit.
- a capillary pipe section 31 runs from the stop valve 27, which leads the refrigerant conveyed in the refrigerant circuit 20 to a wing tube evaporator 41.
- the conveyed refrigerant is injected into a wing tube evaporator 50 via the capillary line section 31 and an entry point not shown in detail here.
- the wing tube evaporator 50 is located in a receiving space 7 for storing Chilled goods.
- the refrigerant By expanding or changing the physical state of the refrigerant, preferably R600a or R134a, from liquid to gaseous in the wing tube evaporator 50, it withdraws the heat energy from the receiving space 7 defined by an inner container 3 and enclosed by a housing 2 by means of air-refrigerant tube heat transfer or cools it down .
- a suction power 22 conveys the meanwhile gaseous or at least predominantly gaseous refrigerant back to the compressor 21.
- the gaseous refrigerant is compressed again from the suction line 22 and pressed back into the pressure line 23.
- Control electronics 34 are provided for controlling and regulating the refrigerant circuit 20.
- the control electronics 34 have a signal line to a first temperature sensor 33, which detects the currently existing room temperature or actual temperature of the receiving space 7. If the receiving space 7 is provided as a cooling space, the setpoint temperature value set by a user is usually between 2 ° C and 8 ° C. If the receiving space 7 is provided as a freezer space, the setpoint temperature value set by a user is usually between -14 ° C and -18 ° C.
- the control electronics 46 switches on the compressor 21 via signal lines and opens the stop valve 27, whereby the supply of the wing tube evaporator 50 with refrigerant or the cooling of the receiving space 7 is initiated. If the actual temperature of the receiving space 7 again corresponds to the target temperature value set by the user, regardless of a temperature band or offset supposedly stored in the control electronics, the control electronics 46 switch off the compressor 21 again via signal lines and close the stop valve 27.
- the compressor 21 switches on at a set target temperature value of 6 ° C for the receiving space 7 at 8 ° C detected by the temperature sensor 33 and switches off the compressor 21 again at 4 ° C detected by the temperature sensor 43.
- the control electronics 46 continuously monitor and detect the actual temperature values in the receiving space 7 by means of the temperature sensor 33 and compare them with the setpoint temperature value set by the user or whether the actual temperature value is outside the appropriate range stored temperature band from the receiving space 7 or the storage chamber 12 is located.
- FIG. 3 shows a perspective view of a first embodiment of the wing tube evaporator 50 of the household refrigerator 1 according to the invention.
- a wing tube evaporator 50 is placed on a wall surface 16 of the receiving space 7.
- the wing tube evaporator 50 has a meandering pipe coil 501 that carries refrigerant when the domestic refrigeration appliance 1 is in operation.
- the refrigerant pipe coil 501 comprises a plurality of straight refrigerant pipe lines 503, which are each connected to one another by refrigerant pipe bends 504.
- the straight refrigerant pipe lines 503 each have radially protruding vanes 505 along their longitudinal extension.
- the refrigerant pipe bends 504 are free of radially protruding vanes 505.
- the vane pipe evaporator 50 is single-layered and the individual refrigerant pipe straight lines 503 of the vane pipe evaporator 50 are arranged spatially next to one another along the wall surface 16 of the receiving space 7.
- refrigerant pipe straight lines 503 and refrigerant pipe bends 504 are located on a common, parallel virtual plane E1 to wall surface 16.
- the winged tube evaporator 50 also has a capillary tube 31 which is coupled to an injection point 502 of the winged tube evaporator 50.
- the wings 505 of the individual refrigerant pipe straight lines 503 comprise a first wing section 505a and a second wing section 505b, the first wing section 505a protruding radially in a first orientation from the refrigerant tube straight 503 and the second wing section 505b in the opposite direction to the first wing section 505a in a second orientation sticks out.
- the wing sections 505a, 505b are aligned in such a way that their dimensions are also located on the parallel virtual plane E1.
- the straight refrigerant pipe 503 are structurally connected to one another via one or more webs 509, so that an air gap remains between the radially protruding vanes 505 of the straight refrigerant pipe 503.
- the suction line 22 extends at least partially along the highest point of the wing tube evaporator 50 when the wing tube evaporator 50 or respectively is used as intended Household refrigeration appliance (not shown). This creates the advantage that the liquid components of the refrigerant that have not yet evaporated collect in the wing tube evaporator 50 or remain longer and the gas components of the refrigerant that have already evaporated are sucked off via the suction line 22 by the compressor (not shown), whereby the efficiency of the wing tube evaporator 50 is further increased .
- FIG. 4 shows a perspective view of a second embodiment of the wing tube evaporator 50 of the household refrigerator 1 according to the invention.
- the vane tube evaporator 50 in this embodiment comprises a plurality of radially protruding vane segments 505c on the outer 504a and / or inner radius 504b on the refrigerant pipe bends 504 connecting the refrigerant pipe straight lines 503.
- the fact that the refrigerant pipe bends 504 are also covered with wing segments 505c increases the heat exchange surface or the air-refrigerant pipe heat exchange efficiency of the wing tube evaporator 50 and the operation of the household refrigerator 1 according to the invention is more energetic.
- the refrigerant pipe bends 504 can be bent in a simplified manner and the manufacture of the winged tube evaporator 50 can be simplified as a result.
- the wing segments 505c are to be materially separated from one another by an incision.
- the incision on the inner radius 504b can be cut out in a V-shape prior to the bending process of the refrigerant pipe bend 504, so that the wing segments 505c on the inner radius 504a do not tilt or jam into one another during the bending process.
- FIG. 5 shows a perspective view of a third embodiment of the wing tube evaporator 50 of the household refrigeration device 1 according to the invention.
- the wing tube evaporator 50 in this embodiment comprises a bending angle of essentially 180 ° on the refrigerant tube bend 504 and is loop-shaped.
- the cross section of the refrigerant pipe 501 in the region of the refrigerant pipe loop 504c is twisted about a central axis M of the refrigerant pipe 501 compared to the cross section of the refrigerant pipe 501 in the region of the refrigerant pipe straight line 501.
- the wings 505 or wing sections 505a, 505b protruding radially from the serpentine-shaped bent refrigerant pipe coil 501 can run continuously or without interruption along the refrigerant pipe coil 501, which makes the manufacture of the wing tube evaporator far less complex. Furthermore, through the loop-shaped refrigerant pipe bends 504, the refrigerant pipe coil 501 with the radially protruding vanes 505 can be brought into the meandering structure without further intermediate processing steps in the manufacture of the vane pipe evaporator 50, such as segmenting the vanes 505 on the refrigerant pipe bends 504.
- a prefabricated refrigerant pipe coil 501 usually rolled up on a roll, with radially protruding vanes 505 can advantageously be used to produce the meandering structure of the vane pipe evaporator 50, which can be bent in a simple manner in order to thus achieve a Provide wing tube evaporator 50, which in the area of the refrigerant tube straight line 503, which form the predominant area of the wing tube evaporator 50, allow an air-refrigerant tube heat transfer and wherein the conventionally production-intensive refrigerant tube bends 504 are easy and inexpensive to manufacture.
- FIG. 6 shows a schematic sectional view of a wing tube evaporator 50 according to FIGS. 3 to 5 arranged in a receiving space 7 of the domestic refrigeration appliance 1 according to the invention.
- the wing tube evaporator 50 extends essentially parallel to one of the wall surfaces 16 of the receiving space 7.
- the wing tube evaporator 50 has a plurality of individual refrigerant tube straight lines 503, which are connected to one another in a gas- and liquid-tight manner by refrigerant tube bends (not shown).
- the straight refrigerant pipe lines 503 extend essentially horizontally in the receiving space 7 when the household refrigeration device 1 according to the invention is set up for operation or when it is used for operation.
- all straight line refrigerant pipes 503 are located on a common virtual plane E1 parallel to the wall surface 16.
- the straight refrigerant pipe 503 or the virtual plane E1 lies at a defined distance A of 5 mm to 50 mm from the wall surface 16.
- the distance should be defined in such a way that an air mass flow LMS generated by a fan 11 can flow around or wash around the wing tube evaporator 50 on both sides or left and right according to the view according to FIG.
- the wing tube evaporator 50 also has wings 505 or wing sections 505a, 505b protruding radially from the refrigerant tube straight lines 503.
- All of the wings 505 or wing sections 505a, 505b also lie on the virtual plane E1 at a defined distance A from the wall surface 16. Because both the If the wing 50 and the straight refrigerant pipe 503 lie in one layer on a common plane E1 at a defined distance A from the wall surface 16, the evaporator chamber 13 can be made particularly slim in the depth direction and the storage space of the storage chamber 12 increases relative to this.
- a partition 14 divides the storage chamber 12 from the evaporator chamber 13.
- the partition 14 defines a suction 142 and a blow-out area 141, in this embodiment the blow-out area 141 is provided on the fan side on the partition 14 and the suction area 141 away from the fan 11 on the partition 14 is provided.
- FIG. 7 shows a schematic sectional view of a modified embodiment of a wing tube evaporator 50 according to FIGS. 3 to 5 arranged in a receiving space 7 of the domestic refrigeration appliance 1 according to the invention.
- the wing tube evaporator 50 is also arranged in an evaporator chamber 13 which is separated from the storage chamber 12 by a partition 14.
- a fan 11 is also provided, which is connected to the partition 14 or to a wall surface 16 of the receiving space 7.
- the partition 14 forms a suction area 142 and a blow-out area 141 in order to circulate the air mass flow LMS, which is cooled by the wing tube evaporator 50 and conveyed by the fan 11, between the evaporator chamber 13 and the storage chamber 12.
- the wing tube evaporator 50 arranged in the evaporator chamber 13 has refrigerant tube straight lines 503, which together lie on a virtual plane E1 arranged parallel to the wall surface 16.
- the straight line refrigerant pipe 503 essentially forms a vertical straight line which extends parallel to one of the wall surfaces 16 of the receiving space 7.
- FIG. 6 the embodiment of FIG.
- the vanes 505 consist of a first vane section 505a, which protrudes in a first direction from the straight refrigerant tube 503, and a second vane section 505a, which protrudes radially from the straight refrigerant tube 503 in the opposite direction to the first vane section 505a.
- the wings 505 or wing sections 505a, 505b of a first refrigerant pipe straight line 503a span a first wing plane FE1 and the wings 505 or wing sections 505a, 505b of the second refrigerant pipe straight 503b span a second wing plane FE2.
- the second refrigerant pipe straight line 503b immediately following the flow direction protrudes from the virtual plane E1 spanned by the refrigerant pipe straight 503, the first wing plane FE1 and the second wing plane FE2 intersect the wall surface 16 parallel to the virtual plane E1 spanned by the refrigerant pipe straight 503 at a certain angle.
- the first wing plane FE1 intersects the wall surface 16 advantageously at an obtuse angle a or advantageously at an angle a between 90 ° ⁇ a ⁇ 180 ° and the second wing plane FE2 intersects the wall surface 16 at an acute angle ⁇ or at a Angle ß between 0 ° ⁇ ß ⁇ 90 °.
- FIG. 8 shows a schematic sectional view of a modified embodiment of a wing tube evaporator 50 according to FIGS. 3 to 5 arranged in a receiving space 7 of the domestic refrigeration appliance 1 according to the invention.
- the wing tube evaporator 50 is also arranged in an evaporator chamber 13 which is separated from the storage chamber 12 by a partition 14.
- a fan 11 is also provided, which is connected to the partition 14 or to a wall surface 16 of the receiving space 7.
- the partition 14 forms a suction area 142 and a blow-out area 141 in order to circulate the air mass flow LMS conveyed by the fan 11 between the evaporator chamber 13 and the storage chamber 12.
- the straight refrigerant pipe lines 503 are not located on a common plane or are offset from one another or offset relative to the wall surface 16 or rear wall of the receiving space 7. At least two refrigerant pipe straight lines 503 that follow one another directly in the flow direction of the refrigerant in the wing tube evaporator are arranged offset relative to the wall surface 16 or rear wall of the receiving space 7.
- a second straight refrigerant pipe 503b following a first straight refrigerant pipe 503a in the flow direction of the refrigerant flowing through the refrigerant pipe loop 501 has a smaller distance A relative to the wall surface 16 than the straight straight refrigerant pipe 503a.
- One of the second straight refrigerant pipe 503b in the flow direction of the refrigerant flowing through the refrigerant pipe loop 501, the third straight refrigerant pipe straight 503c in turn has a greater distance A 'from the wall surface 16 than the second straight refrigerant pipe 503b.
- the second straight refrigerant pipe 503b and a fourth straight refrigerant pipe 503d are located on a common, parallel to the wall surface 16 extending first virtual plane E1 at a distance A relative to the wall surface 16.
- the first straight refrigerant pipe 503a and the third straight refrigerant pipe 503c are located on one common, parallel to the wall surface 16 arranged virtual plane E2 at a distance A 'from the wall surface 16.
- the refrigerant pipe straight lines 503 are arranged at different distances from the wall surface 16, the refrigerant pipe straight lines 503 are directly by the air mass flow generated by a fan 11 LMS flows around, whereby the heat exchange or air-refrigerant tube heat transfer of the wing tube evaporator 50 is improved when used in a domestic refrigeration device. Since the straight refrigerant pipe 503 of the vane tube evaporator 50 are arranged offset to one another, the refrigerant pipe straight lines 503 are located away from the slipstream or flow shadow of a refrigerant pipe straight 503 in the air mass flow LMS in front, whereby the air-refrigerant pipe heat transfer or the heat exchange efficiency of the vane pipe evaporator 50 is generally increased.
- FIGS. 9a-9g show sectional views through refrigerant pipe straight lines 503 of the wing tube evaporator 50 of the domestic refrigeration appliance 1 according to the invention.
- FIG. 9a shows an arched cross section through a straight refrigerant pipe 503 with vanes 505 or vane sections 505a, 505b protruding radially from the straight refrigerant pipe 503.
- the cross section of the straight refrigerant pipe 503 is elliptical in this embodiment, but can also be formed in the shape of a circular arc.
- the straight refrigerant pipe 503 also has a refrigerant-carrying cavity 503e.
- the vanes 505 or the vane sections 505a, 505b extend in the opposite direction radially away from the straight refrigerant pipe 503 and form a horizontal axis H.
- the elliptical or circular arc-shaped cross section of the straight refrigerant pipe 503 with the blades 505 is designed to be mirror-symmetrical relative to the horizontal axis H in this embodiment.
- FIG. 9b shows that the blades 505 or the blade sections 505a, 505b form a straight line which intersects the elliptical or circular arc-shaped refrigerant pipe straight line 503 at the circumferential radius or as a tangent.
- the straight refrigerant pipe 503 with the blades 505 or blade sections 505a, 505b in this embodiment is configured asymmetrically relative to a horizontal axis H formed by the blades 505.
- FIG. 9c shows a semi-elliptical or semicircular cross-section of a straight refrigerant pipe 503.
- the blades 505 or blade sections 505a, 505b form a straight line which lies on a straight side of the semi-elliptical or semi-circular cross-section of the straight refrigerant pipe 503.
- the straight refrigerant pipe 503 with the vanes 505 in this embodiment is configured asymmetrically relative to a horizontal axis H formed by the vanes 505.
- FIG. 9d shows a right-angled cross section of a straight refrigerant pipe 503.
- the blades 505 or blade sections 505a, 505b form a horizontal axis H.
- the right-angled cross section of the straight refrigerant pipe 503 with the blades 505 is mirror-symmetrical relative to a horizontal axis H formed by the blades 505.
- FIG. 9 e shows a cross section of a straight refrigerant pipe 503 with ribs 503 f, which protrude into the refrigerant-carrying cavity 503 e of the straight refrigerant pipe 503.
- the ribs 503f are advantageously formed at the same time as the refrigerant pipe is manufactured by means of extrusion. Because the ribs 503f increase the surface area on the inner wall of the refrigerant tube, the air-refrigerant heat transfer of the wing tube evaporator 50 can be improved.
- FIG. 9f shows a right-angled cross section of a straight refrigerant pipe 503 with a refrigerant-carrying cavity 503e which has a plurality of refrigerant chambers 503h separated from one another by partition walls 503g.
- the fact that the refrigerant is forced or guided through a multiplicity of small refrigerant chambers 503h results in an increase in the heat exchanger surface or in the air-refrigerant heat transfer Wing tube evaporator 50.
- the wings 505 or wing sections 505a, 505b form a horizontal axis H.
- FIG. 9g shows a right-angled cross section of a straight refrigerant pipe 503 with an arrangement of the vanes 505 or vane sections 505a, 505b on the remote side.
- the wings 505 or wing sections 505a, 505b form a straight line which runs on an outer edge or a long side of the right-angled cross section of the straight refrigerant pipe 503.
- the straight refrigerant pipe 503 with the blades 505 is asymmetrical relative to a horizontal axis H formed by the blades 505.
- Refrigerator door 503a first straight refrigerant pipe
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Geometry (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102019219266.1A DE102019219266A1 (de) | 2019-12-10 | 2019-12-10 | Haushaltskältegerät |
PCT/EP2020/082382 WO2021115738A1 (de) | 2019-12-10 | 2020-11-17 | Haushaltskältegerät |
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EP4073440A1 true EP4073440A1 (de) | 2022-10-19 |
Family
ID=73476137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20808366.7A Withdrawn EP4073440A1 (de) | 2019-12-10 | 2020-11-17 | Haushaltskältegerät |
Country Status (3)
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EP (1) | EP4073440A1 (de) |
DE (1) | DE102019219266A1 (de) |
WO (1) | WO2021115738A1 (de) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1368148A (fr) * | 1963-04-30 | 1964-07-31 | échangeur de chaleur en serpentins et sa fabrication | |
US3540530A (en) * | 1968-06-12 | 1970-11-17 | Peerless Of America | Gradated heat exchange fins |
IT1295570B1 (it) * | 1997-06-25 | 1999-05-13 | Raco Spa | Scambiatore di calore a tubazione alettata |
DE202007016841U1 (de) * | 2007-11-30 | 2008-02-28 | Kirchner, Jörg | Wärmeübertragungsrohr |
DE102012005513A1 (de) * | 2012-03-19 | 2013-09-19 | Bundy Refrigeration Gmbh | Wärmetauscher, Verfahren zu seiner Herstellung sowie verschiedene Anlagen mit einem derartigen Wärmetauscher |
DE102013223160A1 (de) * | 2013-11-13 | 2015-05-28 | BSH Hausgeräte GmbH | Kältegerät und Lamellenverdampfer dafür |
-
2019
- 2019-12-10 DE DE102019219266.1A patent/DE102019219266A1/de active Pending
-
2020
- 2020-11-17 WO PCT/EP2020/082382 patent/WO2021115738A1/de unknown
- 2020-11-17 EP EP20808366.7A patent/EP4073440A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
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DE102019219266A1 (de) | 2021-06-10 |
WO2021115738A1 (de) | 2021-06-17 |
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