EP0918199B1 - Refrigerator - Google Patents
Refrigerator Download PDFInfo
- Publication number
- EP0918199B1 EP0918199B1 EP98122073A EP98122073A EP0918199B1 EP 0918199 B1 EP0918199 B1 EP 0918199B1 EP 98122073 A EP98122073 A EP 98122073A EP 98122073 A EP98122073 A EP 98122073A EP 0918199 B1 EP0918199 B1 EP 0918199B1
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- EP
- European Patent Office
- Prior art keywords
- planes
- frost
- evaporator
- appliance according
- refrigerating appliance
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
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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
-
- 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
- F28F1/126—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 consisting of zig-zag shaped fins
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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
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
- F28D2021/0071—Evaporators
Definitions
- the invention relates to a Nofrost refrigeration device according to the preamble of Claim 1.
- Such Device is e.g. from US-A-3 081 608.
- refrigerators and freezers designed as no-frost refrigerators, they are used for refrigeration serving evaporator outside their storage room and arranged in the generally designed as a so-called finned evaporator.
- meandered evaporator tubes are provided, which for enlargement their heat-transferring surface arranged along their meandering shape, are provided in the form of thin-walled sheets produced lamellae.
- the production Such evaporator is expensive to manufacture and expensive, in particular, when the evaporator tubes of straight and curved single pipe pieces assembled and soldered together.
- the invention is based on the object, a refrigerator according to the preamble of Claim 1 with simple constructive measures to improve.
- platinum-like levels Due to the platinum-like levels are elaborate without manufacturing technology Measures, eg. B. in the form of slats to bring in approach, cost produced large heat exchange surfaces, by their parallel arrangement over each other At the same time a targeted cooling capacity is possible with low space requirements.
- the platinum-like levels open up the opportunity to increase the cooling capacity of the evaporator with simple production engineering measures to increase the arrangement density of the refrigerant channel arrangement.
- the planes are formed by bending an integral board, in whose angled State the planes are at least approximately parallel and are provided with the refrigerant channel arrangement.
- Such an evaporator is not only production technology particularly simple and inexpensive producible but offers by its U-shaped cross section a high inherent rigidity, so that the handling of the evaporator in production significantly easier is.
- Manufacturing technology particularly easy to change the channel image of the evaporator and thus particularly purposefully adaptable to its required cooling capacity, when according to a next preferred embodiment of the subject invention is provided, which is the board with the refrigerant channel arrangement arranged thereon produced in the roll bond or Z-Bond method.
- a particularly cost-effective design for an evaporator results when after a next preferred embodiment of the subject of the invention is provided, in that the refrigerant channel arrangement is designed as a coiled tubing is, which is set at the levels in thermally conductive contact.
- an evaporator allows a targeted Material combination between the pipeline carrying the refrigerant and the Heat exchange surfaces representing levels, whereby the heat transfer between the two Elements can be optimized in a simple manner.
- the refrigerant channel arrangement on the evaporator when according to a next advantageous embodiment of the subject invention is provided that the refrigerant channel arrangement on the mutually facing surfaces the levels is provided.
- the two planes exposed surface elements arranged out of its surface exhibit.
- a particularly intensive turbulence of the air flowing around the heat exchange surfaces gives good heat transfer from the heat exchange surfaces to this air when, according to a last preferred embodiment of the subject the invention is provided that the surface elements alternately from the planes are exposed and placed both in the space between the two Plains as well as facing away from it are directed outwards.
- FIG. 1 shows a first embodiment of one for use in so-called no-frost refrigerators, as refrigerators or freezers, suitable evaporator 10 is shown which three superposed at a parallel distance, made of thermally conductive material such as aluminum or aluminum alloys made levels 11 having. These are due to repeated bending of a platinum-like aluminum sheet blank produced by the angled an essentially perpendicular to the planes 11 arranged wall piece 12 is provided, which two in each case adjacently arranged planes 11 integrally connects to each other.
- the Layers 11 are at their facing inner sides with a meandering equipped refrigerant channel assembly 13, which in Rollbondbacter is introduced into the platinum-like blank of the evaporator 10, wherein the refrigerant channel arrangement 13 at the higher and middle level 11 and the two levels 11 interconnecting wall piece 12 on the one outer side the board is provided while the refrigerant channel assembly 13 at the middle and lower level 11 and serving to connect wall piece 12 is arranged on the opposite outside of the board.
- the at the middle level 11 on both sides of this board section provided refrigerant channel arrangements 13 are interconnected by a not-shown channel piece connected, so that the three levels 11 with a continuous running Refrigerant guide are covered, which of a chiller of a no-frost refrigerator supplied with refrigerant.
- Fig. 3 shows a simplified schematic representation of another embodiment of a Evaporator 20, which two platinum-like example of aluminum or aluminum alloy formed planes 21, which in parallel distance from each other are arranged.
- the planes 21 are at their inner sides facing each other 22 is provided with a meandering applied refrigerant channel arrangement 23, which by, for example, made of a copper tube, in heat-conducting contact with the levels 21 standing pipeline is formed.
- the refrigerant channel assemblies 23 on the inner sides 22 are interconnected by a connecting piece 24, so that the evaporator 20 is a continuous over its two planes 21 extending Has refrigerant guide.
- the planes 21 form one another by their distance from one another Gap 25, which for forced ventilation of the inner sides 22, in particular the refrigerant channel assembly 23 is used, the ventilation, which for increasing the heat transfer to the forced circulating air is used, across the meandering applied refrigerant channel assemblies 23 along the planes 21 takes place, as this is shown by way of example in Fig. 4 by means of an arrow.
- FIGS. 5 and 6 show an evaporator 30 which is similar to the evaporator 20 is like this two in parallel spaced, platinum-like running planes 31 of heat-conducting material, such as aluminum or the like which, like the planes 21 on their mutually facing inner sides 32 with each a meandering refrigerant channel arrangement 33 are equipped, which interconnected by a connector 34 to a continuous over the entire evaporator extending refrigerant duct are connected.
- the levels 31 form by their vertical distance from each other between their inner sides 32 a Interspace 35, which like the gap 25 by a means of a fan forcibly circulated cooling air (symbolically represented in Fig.
- the wave profile 36 is, for example, by chipless deformation a made of good heat conducting material such as aluminum, copper or the like Sheet metal produced and has in its corrugated form, at least as far as possible the dimensions of the levels 31.
- FIGS. 7 and 8 show a variant embodiment similar to that of the evaporator 30 an evaporator 40 having two spaced apart in parallel Layers 41. These are on their mutually facing inner sides 42, each with a meandering arranged refrigerant channel assembly 43 is provided, which via a tube-like trained connector are interconnected and which from a meandering, in heat-conducting contact with the planes 41 standing Pipe made of good heat conducting material such as copper, aluminum or the like is shaped. Between the planes 41 is by their parallel distance to each other a gap 45 is generated within which along the levels 41st Cooling air to achieve a more favorable heat transfer forcibly in the direction of arrow (see Fig. 8) is conveyed.
- wave profile sections 46 and 47 are provided, of which both wave profile sections 46 and 47 on the refrigerant channel arrangement 43 of the higher level 41 and on the refrigerant channel assembly 43 of the lower level 41 lie in thermally conductive contact.
- the wave profile sections 46 and 47 are to increase the turbulence of forcibly in the Interspace 45 promoted cooling air offset from each other so arranged that the Wave troughs and troughs of the conveyed in the arrow direction cooling air arranged strip-like Wave profile sections opposite to each other (see Fig. 7).
- FIGS. 9 and 10 show a further embodiment of an evaporator 50, which consists of two in parallel spaced superimposed planes 51 of good thermally conductive material such as aluminum or an aluminum alloy is formed.
- the levels 51 are each facing their inner sides 52 each with a Refrigerant channel assembly 53 in the form of a meandering shaped pipeline good heat conducting material such as copper, wherein the refrigerant channel arrangements 53 through a pipe connector 54 to a continuous extending refrigerant guide for the evaporator 50 are connected.
- the space 56 is to achieve a promoted more favorable heat transfer using a fan forcibly cooling air, which in addition due to the lobes 55 exposed in different directions is swirled, so that the turbulence of the forced into the space promoted cooling air increases and in this way the heat transfer in addition is improved.
Description
Die Erfindung betrifft ein Nofrost-Kältegerät gemäß dem Oberbegriff des Anspruchs 1. Ein solches Gerät ist z.B. aus der US-A-3 081 608 bekannt.The invention relates to a Nofrost refrigeration device according to the preamble of Claim 1. Such Device is e.g. from US-A-3 081 608.
Bei als No-Frostkältegeräte ausgebildeten Kühl- und Gefrierschränken sind die zur Kälteerzeugung dienenden Verdampfer außerhalb ihres Lagerraumes angeordnet und im allgemeinen als sogenannte Lamellenverdampfer ausgebildet. Bei dieser Art von Verdampfer sind meanderartig angelegte Verdampferrohre vorgesehen, welche zur Vergrößerung ihrer wärmeübertragenden Oberfläche mit entlang ihrer Meanderform angeordneten, in Form von dünnwandigen Blechen gefertigten Lamellen versehen sind. Die Herstellung derartiger Verdampfer ist fertigungstechnisch aufwendig und kostenintensiv, insbesondere dann, wenn die Verdampferrohre aus geraden und gebogenen Einzelrohrstücken zusammengefügt und miteinander verlötet werden.In refrigerators and freezers designed as no-frost refrigerators, they are used for refrigeration serving evaporator outside their storage room and arranged in the generally designed as a so-called finned evaporator. In this type of evaporator meandered evaporator tubes are provided, which for enlargement their heat-transferring surface arranged along their meandering shape, are provided in the form of thin-walled sheets produced lamellae. The production Such evaporator is expensive to manufacture and expensive, in particular, when the evaporator tubes of straight and curved single pipe pieces assembled and soldered together.
Der Erfindung liegt die Aufgabe zugrunde, ein Kältegerät gemäß dem Oberbegriff des Anspruches 1 mit einfachen konstruktiven Maßnahmen zu verbessern.The invention is based on the object, a refrigerator according to the preamble of Claim 1 with simple constructive measures to improve.
Diese Aufgabe wird gemäß der Erfindung durch die Merkmale des Anspruchs 1 gelöst.This object is achieved according to the invention solved by the features of claim 1.
Durch die platinenartig gestalteten Ebenen sind ohne fertigungstechnisch aufwendige Maßnahmen, z. B. in Form von Lamellen, in Ansatz bringen zu müssen, kostengünstig große Wärmetauschflächen erzeugt, durch deren parallele Anordnung über einander zugleich eine zielgerichtete Kälteleistung bei geringen Raumbedarf ermöglicht ist. Darüber hinaus eröffnen die platinenartig ausgebildeten Ebenen die Möglichkeit, zur Steigerung der Kälteleistung des Verdampfers mit einfachen fertigungstechnischen Maßnahmen die Anordnungsdichte der Kältemittelkanalanordnung zur steigern.Due to the platinum-like levels are elaborate without manufacturing technology Measures, eg. B. in the form of slats to bring in approach, cost produced large heat exchange surfaces, by their parallel arrangement over each other At the same time a targeted cooling capacity is possible with low space requirements. In addition, the platinum-like levels open up the opportunity to increase the cooling capacity of the evaporator with simple production engineering measures to increase the arrangement density of the refrigerant channel arrangement.
Nach der Erfindung ist vorgesehen, daß die Ebenen durch Abwinklung einer einstückigen Platine gebildet sind, in deren abgewinkelten Zustand die Ebenen sich zumindest annähernd parallel gegenüberliegen und mit der Kältemittelkanalanordnung versehen sind.According to the invention, it is provided that the planes are formed by bending an integral board, in whose angled State the planes are at least approximately parallel and are provided with the refrigerant channel arrangement.
Ein derartiger Verdampfer ist nicht nur fertigungstechnisch besonders einfach und kostengünstig herstellbar sondern bietet durch seinen U-förmigen Querschnitt eine hohe Eigensteifigkeit, so daß das Handling des Verdampfers in der Fertigung deutlich erleichtert ist.Such an evaporator is not only production technology particularly simple and inexpensive producible but offers by its U-shaped cross section a high inherent rigidity, so that the handling of the evaporator in production significantly easier is.
Fertigungstechnisch besonders einfach abänderbar ist das Kanalbild des Verdampfers und somit besonders zielgerichtet anpaßbar an dessen bedarfsgemäße Kälteleistung, wenn nach einer nächsten bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, das die Platine mit der darauf angeordneten Kältemittelkanalanordung im Roll-Bond- oder mit Z-Bond-Verfahren erzeugt ist.Manufacturing technology particularly easy to change the channel image of the evaporator and thus particularly purposefully adaptable to its required cooling capacity, when according to a next preferred embodiment of the subject invention is provided, which is the board with the refrigerant channel arrangement arranged thereon produced in the roll bond or Z-Bond method.
Ein besonders kostengünstiger Aufbau für einen Verdampfer ergibt sich, wenn nach einer nächsten bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß die Kältemittelkanalanordnung als eine in Windungen geformte Rohleitung ausgeführt ist, welche an den Ebenen in wärmeleitenden Kontakt festgesetzt ist.A particularly cost-effective design for an evaporator results when after a next preferred embodiment of the subject of the invention is provided, in that the refrigerant channel arrangement is designed as a coiled tubing is, which is set at the levels in thermally conductive contact.
Darüber hinaus ermöglicht eine derartige Ausführung eines Verdampfers eine gezielte Materialkombination zwischen der das Kältemittel führenden Rohrleitung und den die Wärmetauschflächen darstellenden Ebenen, wodurch der Wärmeübergang zwischen beiden Elementen auf einfache Weise optimierbar ist.In addition, such an embodiment of an evaporator allows a targeted Material combination between the pipeline carrying the refrigerant and the Heat exchange surfaces representing levels, whereby the heat transfer between the two Elements can be optimized in a simple manner.
Besonders zweckmäßig angeordnet ist die Kältemittelkanalanordnung am Verdampfer, wenn nach einer nächsten vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß die Kältemittelkanalanordnung an den einander zugewandten Flächen der Ebenen vorgesehen ist. Particularly expediently arranged is the refrigerant channel arrangement on the evaporator, when according to a next advantageous embodiment of the subject invention is provided that the refrigerant channel arrangement on the mutually facing surfaces the levels is provided.
Ferner ergibt sich hierdurch die Möglichkeit zwischen die Ebenen zum äußerst intensiven wärmeleitenden Kontakt zusätzliche Elemente zur weiteren Vergrößerung der Wärmetauschflächen des Verdampfers einzubringen, ohne dabei den Raumbedarf zur Unterbringung des Verdampfers vergrößern zu müssen.Furthermore, this results in the possibility between the levels to extremely intense thermally conductive contact additional elements for further enlargement of the heat exchange surfaces bring the evaporator, without taking up the space needed to accommodate to increase the evaporator.
Besonders einfach herstellbar ist ein zur Vergrößerung der Wärmetauschflächen dienendes zusätzliches Element, wenn gemäß einer nächsten vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß zwischen den parallel übereinander angeordneten Ebenen ein in wärmeleitenden Kontakt mit diesen stehendes Wellenprofil angeordnet ist.Particularly easy to produce is one serving to increase the heat exchange surfaces additional element, if according to a next advantageous embodiment of the Object of the invention is provided that between the parallel arranged one above the other Layers arranged in a thermally conductive contact with these standing wave profile is.
Entsprechend einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß zwischen den parallel übereinander angeordneten Ebenen mehrere Wellenprofilabschnitte in wärmeleitenden Kontakt mit den Ebenen nebeneinander angeordnet sind, von denen die Wellen von zwei benachbart zueinander angeordneten Wellenprofilabschnitten gegenphasig zueinander verlaufen.According to a further preferred embodiment of the subject of the invention is provided that between the parallel superposed planes several wave profile sections in heat-conducting contact with the planes next to each other are arranged, of which the waves of two adjacent to each other Wave profile sections run in opposite directions to each other.
Durch eine derartige Ausführungsvariante ist mit einfachen Mitteln eine besonders platzsparende und große Wärmetauschfläche im Verdampfer erreicht, wobei die zur Vergrößerung der Wärmetauschfläche beitragenden Wellenprofile durch ihre Anordnung zwischen den beiden Ebenen in besonders intensiven wärmeleitenden Kontakt mit den Ebenen bringbar sind.By such a variant is simple means a particularly space-saving and large heat exchange surface achieved in the evaporator, wherein the enlargement the heat exchange surface contributing wave profiles by their arrangement between the two levels in particularly intense heat-conducting contact with the planes can be brought.
Besonders zweckmäßig ausgebildet sind die dem Verdampfer bildenden Ebenen, wenn nach einer nächsten vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß die beiden Ebenen zumindest weitestgehend geschlossen flächig ausgebildet sind.Specially designed are the evaporator forming levels, if provided according to a next advantageous embodiment of the subject invention is that the two levels formed at least largely closed flat are.
Nach einer nächsten bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß die beiden Ebenen aus ihrer Fläche herausgestellt angeordnete Flächenelemente aufweisen.According to a next preferred embodiment of the subject invention provided that the two planes exposed surface elements arranged out of its surface exhibit.
Hierdurch ist an den Wärmetauschflächen eine Oberflächenvergrößerung bezweckt, welche sich einerseits fertigungstechnisch besonders günstig bei der Herstellung des Verdampfers erzeugen läßt und welche ohne zusätzliche Maßnahmen durch deren unmittelbare Anbindung an die Wärmetauschflächen im besonders intensiven wärmeleitenden Kontakt mit den Wärmetauschflächen steht. Ferner sind durch eine derartige Lösung durch Zusatzmaßnahmen in intensiven wärmeleitenden Kontakt bringbare zusätzliche Elemente zur Vergrößerung der Wärmetauschfläche am Verdampfer vermieden.As a result, a surface enlargement is aimed at the heat exchange surfaces, which on the one hand production technology particularly favorable in the production of the evaporator can produce and which without additional measures by their immediate Connection to the heat exchange surfaces in the particularly intense heat-conducting Contact with the heat exchange surfaces is. Furthermore, by such a solution by additional measures in intensive thermally conductive contact can be brought additional Elements to increase the heat exchange surface on the evaporator avoided.
Eine besonders intensive Verwirbelung der die Wärmetauschflächen umströmenden Luft und damit eine gute Wärmeübertragung von den Wärmetauschflächen auf diese Luft ergibt sich, wenn gemäß einer letzten bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß die Flächenelemente wechselweise aus den Ebenen herausgestellt angeordnet sind und sowohl in den Zwischenraum zwischen die beiden Ebenen als auch davon abgewandt nach außen gerichtet sind.A particularly intensive turbulence of the air flowing around the heat exchange surfaces and thus gives good heat transfer from the heat exchange surfaces to this air when, according to a last preferred embodiment of the subject the invention is provided that the surface elements alternately from the planes are exposed and placed both in the space between the two Plains as well as facing away from it are directed outwards.
Die Erfindung ist in der nachfolgenden Beschreibung anhand mehrerer in der beigefügten Zeichnung vereinfacht dargestellter Ausführungsbeispiel erläutert.The invention is described in the following description with reference to several in the attached Drawing simplified illustrated embodiment explained.
Es zeigen:
- Fig. 1
- Eine erste Ausführungsform eines Verdampfers mit mehreren durch Abwinkelung einer Platine erzeugten parallelen Ebenen in Vorderansicht; diese Ausführungsform ist nicht Bestandteil der Erfindung;
- Fig. 2
- den Verdampfer gemäß Fig. 1 Draufsicht,
- Fig. 3
- eine zweite Ausführungsform eines Verdampfers mit zwei übereinander angeordneten platinenartigen, über eine Rohrkältemittelleitung kältetechnisch aneinander angekoppelten Ebenen, in Vorderansicht,
- Fig. 4
- dem Verdampfer gemäß Fig. 3 in Draufsicht,
- Fig. 5
- dem Verdampfer gemäß Fig. 4 mit einem zwischen seinen Ebenen angeordneten Wellenprofil, in Vorderansicht,
- Fig. 6
- den Verdampfer gemäß Fig. 5 in Draufsicht,
- Fig. 7
- den Verdampfer gemäß Fig. 5 mit einem weiteren zwischen seinen Ebenen gegenphasig zum ersten Wellenprofil angeordneten Wellenprofil, in Vorderansicht,
- Fig. 8
- den Verdampfer gemäß Fig. 7 in Draufsicht,
- Fig. 9
- eine letzte Ausführungsform eines ähnlich zu dem in Fig. 3 dargestellten Verdampfer ausgeführten Verdampfers, mit an seinen platinenartigen Verdampferebenen herausgestellt angeordneten Flächenelementen, in Seitenansicht,
- Fig. 10
- dem Verdampfer gemäß Fig. 9 in Draufsicht.
- Fig. 1
- A first embodiment of an evaporator with a plurality of parallel planes generated by bending a board in front view; this embodiment is not part of the invention;
- Fig. 2
- the evaporator of FIG. 1 top view,
- Fig. 3
- a second embodiment of an evaporator with two superposed platinum-like, via a pipe refrigerant line refrigerated coupled to each other planes, in front view,
- Fig. 4
- the evaporator of FIG. 3 in plan view,
- Fig. 5
- the evaporator according to FIG. 4 with a wave profile arranged between its planes, in front view,
- Fig. 6
- the evaporator of FIG. 5 in plan view,
- Fig. 7
- 5 with another between its planes in phase opposition to the first wave profile arranged wave profile, in front view, the evaporator of FIG.
- Fig. 8
- the evaporator of FIG. 7 in plan view,
- Fig. 9
- a last embodiment of a similar to the evaporator shown in Fig. 3 executed evaporator, with exposed to its platinum-like evaporator planes surface elements, in side view,
- Fig. 10
- the evaporator of FIG. 9 in plan view.
In Fig. 1 ist eine erste Ausführungsform eines zum Einsatz in sogenannten No-Frostkältegeräten,
wie Kühl- oder Gefrierschränke, geeigneter Verdampfer 10 gezeigt, welcher
drei in parallelem Abstand übereinander angeordnete, aus wärmeleitendem Material
wie beispielsweise Aluminium oder Aluminiumlegierungen gefertigte Ebenen 11
aufweist. Diese sind durch mehrmalige Abwinklung eines platinenartigen Aluminiumblechzuschnittes
erzeugt, wobei durch die Abwinklung ein im wesentlichen senkrecht
zu den Ebenen 11 angeordnetes Wandstück 12 geschaffen ist, welches jeweils zwei
benachbart zueinander angeordnete Ebenen 11 einstückig miteinander verbindet. Die
Ebenen 11 sind an ihren einander zugewandten Innenseiten mit einer meanderartig
angelegten Kältemittelkanalanordnung 13 ausgestattet, welche im Rollbondverfahren
in den platinenartigen Zuschnitt des Verdampfer 10 eingebracht ist, wobei die Kältemittelkanalanordnung
13 an der höher liegenden und mittleren Ebene 11 sowie an
dem die beiden Ebenen 11 miteinander verbindenden Wandstück 12 an der einen Außenseite
der Platine vorgesehen ist, während die Kältemittelkanalanordnung 13 an der
mittleren und unteren Ebene 11 sowie dem zu deren Verbindung dienenden Wandstück
12 an der dazu gegenüberliegenden Außenseite der Platine angeordnet ist. Die
an der mittleren Ebene 11 beidseitig diesem Platinenabschnitt vorgesehenen Kältemittelkanalanordnungen
13 sind miteinander durch ein nicht näher gezeigtes Kanalstück
verbunden, so daß die drei Ebenen 11 mit einer durchgehend verlaufenden
Kältemittelführung überzogen sind, welche von einer Kältemaschine eines No-Frostkältegeräts
mit Kältemittel versorgt ist. Durch den Abstand zwischen den benachbart
zueinander angeordneten Ebenen 11 sind Zwischenräume 14 erzeugt, welche zur
zwangsweisen Belüftung der Ebenen 11 und somit zur Steigerung des Wärmeüberganges
an den Ebenen 11 auf die beispielsweise von einem Ventilator zwangsweise
umgewälzte Kühlluft dienen, wobei die Belüftungsrichtung des Verdampfers 10 quer zu
der meanderförmig angelegten Kältemittelkanalanordnung 13 erfolgt, wie dies beispielhaft
in Fig. 2 durch einen Pfeil angedeutet ist. 1 shows a first embodiment of one for use in so-called no-frost refrigerators,
as refrigerators or freezers,
Fig. 3 zeigt in vereinfachter schematischer Darstellung eine weitere Ausführungsform eines
Verdampfers 20, welcher zwei platinenartig beispielsweise aus Aluminium oder Aluminiumlegierung
ausgebildete Ebenen 21 aufweist, welche in parallelen Abstand zueinander
angeordnet sind. Die Ebenen 21 sind an ihren einander zugewandten Innenseiten
22 mit einer meanderartige angelegten Kältemittelkanalanordnung 23 versehen, welche
durch beispielsweise aus einem Kupferrohr gefertigten, in wärmeleitenden Kontakt mit
den Ebenen 21 stehenden Rohrleitung gebildet ist. Die Kältemittelkanalanordnungen 23
an den Innenseiten 22 sind untereinander durch ein Verbindungsstück 24 verbunden, so
daß der Verdampfer 20 eine über seine beiden Ebenen 21 durchgehende verlaufende
Kältemittelführung aufweist. Die Ebenen 21 bilden durch ihren Abstand zueinander einen
Zwischenraum 25, welcher zur zwangsweisen Belüftung der Innenseiten 22, insbesondere
der Kältemittelkanalanordnung 23 dient, wobei die Belüftung, welche zur Steigerung
des Wärmeübergangs auf die zwangsweise umgwälzte Luft dient, quer zu den meanderförmig
angelegten Kältemittelkanalanordnungen 23 entlang der Ebenen 21 erfolgt, wie
dies beispielhaft in Fig. 4 mittels eines Pfeiles gezeigt ist.Fig. 3 shows a simplified schematic representation of another embodiment of a
Fig. 5 und Fig. 6 zeigt einen Verdampfer 30, welcher ähnlich dem Verdampfer 20 ausgebildet
ist und wie dieser zwei in parallelen Abstand zueinander angeordnete, platinenartig
ausgeführte Ebenen 31 aus wärmeleitendem Material, wie Aluminium oder dergleichen
aufweist, welche wie die Ebenen 21 an ihren einander zugewandten Innenseiten 32 mit je
einer meanderförmig verlaufenden Kältemittelkanalanordnung 33 ausgestattet sind,
welche untereinander durch ein Verbindungsstück 34 zu einer durchgehend über den
gesamten Verdampfer verlaufenden Kältemittelführung verbunden sind. Die Ebenen 31
bilden durch ihren vertikalen Abstand zueinander zwischen ihren Innenseiten 32 einen
Zwischenraum 35, welcher wie der Zwischenraum 25 von einer mittels eines Ventilators
zwangsweise umgewälzten Kühlluft (in Fig. 6 mit einem Pfeil symbolisch dargestellt) zur
Erreichung eines günstigeren Wärmeübergangs zwangsweise belüftet ist und welcher zur
Aufnahme eines die Wärmeübertragungsfläche der Ebenen 31 vergrößernden Wellenprofils
36 dient. Dieses befindet sich innerhalb des Zwischenraumes 35 in wärmeleitenden
Kontakt mit der Kältemittelkanalanordnung 33 an den Innenseiten 32 und dient zusätzlich
zur Steigerung der Turbulenzen für die zwangsweise durch den Zwischenraum
35 geförderte Kühlluft. Das Wellenprofil 36 ist beispielsweise durch spanlose Verformung
einer aus gut wärmeleitenden Material wie Aluminium, Kupfer oder der dergleichen gefertigten
Blechplatine erzeugt und besitzt in seiner gewellten Form zumindest weitestgehend
die Abmessungen der Ebenen 31. FIGS. 5 and 6 show an
Die Figuren 7 und 8 zeigen eine ähnlich dem Verdampfer 30 ausgebildete Ausführungsvariante
eines Verdampfers 40 mit zwei im parallelen Abstand zueinander angeordneten
Ebenen 41. Diese sind an ihren einander zugewandten Innenseiten 42 mit je einer meanderartig
angeordneten Kältemittelkanalanordnung 43 versehen, welche über ein rohrartig
ausgebildetes Verbindungsstück miteinander verbunden sind und welche aus einer
meanderförmig geformten, in wärmeleitenden Kontakt mit den Ebenen 41 stehenden
Rohrleitung aus gut wärmeleitenden Material wie beispielsweise Kupfer, Aluminium oder
dergleichen geformt ist. Zwischen den Ebenen 41 ist durch deren parallelem Abstand
zueinander ein Zwischenraum 45 erzeugt, innerhalb welchen entlang der Ebenen 41
Kühlluft zur Erzielung eines günstigeren Wärmeübergangs zwangsweise in Pfeilrichtung
(siehe Fig. 8) gefördert ist. Innerhalb des Zwischenraumes 45 sind Wellenprofilabschnitte
46 und 47 vorgesehen, von denen beide Wellenprofilabschnitte 46 und 47 an der Kältemittelkanalanordnung
43 der höher liegenden Ebene 41 und an der Kältemittelkanalanordnung
43 der tieferliegenden Ebene 41 in wärmeleitenden Kontakt anliegen. Die Wellenprofilabschnitte
46 und 47 sind zur Steigerung der Turbulenz der zwangsweise in den
Zwischenraum 45 geförderten Kühlluft derart versetzt zueinander angeordnet, daß die
Wellentäler und Wellentäler der in Pfeilrichtung geförderten Kühlluft angeordneten streifenartigen
Wellenprofilabschnitte gegenphasig zueinander verlaufen (siehe hierzu Fig. 7).FIGS. 7 and 8 show a variant embodiment similar to that of the evaporator 30
an
In Fig. 9 und Fig. 10 ist eine weitere Ausführungsform eines Verdampfers 50 dargestellt,
welcher aus zwei in parallelen Abstand übereinander angeordneten Ebenen 51 aus gut
wärmeleitenden Material wie beispielsweise Aluminium oder einer Aluminiumlegierung
gebildet ist. Die Ebenen 51 sind ihren aneinander zugewandten Innenseiten 52 je mit einer
Kältemittelkanalanordnung 53 in Form einer meanderartig geformten Rohrleitung aus
gut wärmeleitendem Material wie beispielsweise Kupfer versehen, wobei die Kältemittelkanalanordnungen
53 durch ein Rohrleitungsverbindungsstück 54 zu einer durchgehend
verlaufenden Kältemittelführung für den Verdampfer 50 verbunden sind. Dieser ist
an seinen beiden Ebenen 51 mit zungenartig ausgeführten, aus der Fläche der Ebenen
51 herausgestellt angeordneten Lappen 55 versehen, welche zwischen den meanderartig
angelegten Rohrabschnitten der Kältemittelkanalanordnung vorgesehen und ähnlich einer
Matrix angeordnet sind, deren Spalten im wesentlichen senkrecht zu den Rohrleitungsabschnitten
der Kältemittelkanalanordnungen 53 verlaufen. Von den Spalten der Matrix sind
die unmittelbar benachbarten höhenversetzt zueinander angeordnet, wobei die Lappen
55 innerhalb der um den Höhenversatz zurückgesetzten Spalten mit ihren freien Ende in
einen durch den Abstand der Ebenen 51 gebildeten Zwischenraum 56 ragen, während
die in den verbleibenden Spalten der Matrix vorgesehen Lappen 55 mit ihren freien Ende
vom Zwischenraum 56 weggerichtet sind. In den Zwischenraum 56 wird zur Erzielung eines
günstigeren Wärmeübergangs anhand eines Ventilators zwangsweise Kühlluft gefördert,
welche in Folge der in unterschiedlicher Richtung herausgestellten Lappen 55 zusätzlich
verwirbelt wird, so daß sich die Turbulenz der zwangsweise in den Zwischenraum
geförderten Kühlluft erhöht und auf diese Weise die Wärmeübertragung zusätzlich
verbessert ist.FIGS. 9 and 10 show a further embodiment of an
Das sich aufgrund des Reifansatzes an den Verdampfern während der Abtauzeit ergebende Schmelzwasser soll anhand eines Drainagesystems, welches in die Ebenen eingebracht sein soll abgeführt werden, wodurch die Gefahr, daß das Abtauwasser erneut an den Ebenen der Verdampfer festfriert deutlich minimiert ist. Ein mit einem Drainagesystem in seinen Ebenen versehener Verdampfer läßt sich, ohne die Abtaufunktion zu beeinträchtigen, auch in horizontaler Einbaulage verwenden. Für den Fall, daß an den Ebenen auf ein Drainagesystem verzichtet werden soll, ist es vorteilhaft, die Verdampfer mit ihren Ebenen in einer vertikalen Einbaulage zu verwenden, um stets sicherzustellen, daß das während der Abtauphase anfallende Schmelzwasser rasch von den Ebenen ablaufen kann und somit nicht die Gefahr besteht, daß dieses erneut an den Ebenen der Verdampfer festfriert.This is due to the frost accumulation on the evaporators during defrosting Meltwater should be introduced by means of a drainage system, which enters the levels should be removed, thereby increasing the risk that the defrost water again At the levels of the evaporator freeze is significantly minimized. One with a drainage system in its levels provided evaporator can be, without the Abtaufunktion to also use in horizontal mounting position. In the event that to the Layers should be dispensed with a drainage system, it is beneficial to the evaporator with their levels in a vertical mounting position to always ensure that the meltwater accumulating during the defrosting phase run off the levels rapidly and thus there is no risk of it being re - used at the levels of Freeze evaporator.
Claims (9)
- Frost-free refrigerating appliance with a refrigerating chamber and with an evaporator, which is arranged outside the refrigerating chamber to be cooled, for forced aeration by way of a fan forcibly conveying the cooled cold air into the refrigerating chamber, wherein the evaporator is formed by at least two heat-conducting planes (21, 31, 41, 51), which are arranged approximately parallel to and one above the other and across which at least one refrigerant channel (23, 33, 43, 53), which connects the two planes together in terms of refrigeration and which is disposed in heat-conducting contact with the planes, extends, characterised in that the planes (21, 31, 41, 51) are formed by bending over a plate, which in the bent-over state has an at least approximately U-shaped cross-section and which is provided at at least one of the large-area plate surfaces thereof with a refrigerant channel (23, 33, 43, 53).
- Frost-free refrigerating appliance according to claim 1, characterised in that the refrigerant channel (23, 33, 43, 53) at the plate is produced in the roll-bonding method.
- Frost-free refrigerating appliance according to claim 1 or 2, characterised in that the refrigerant channel (23, 33, 43, 53) is executed as a pipe duct which is formed into coils and which is fixed to the planes (21, 31, 41, 51) in heat-conducting contact.
- Frost-free refrigerating appliance according to one of claims 1 to 3, characterised in that the refrigerant channel (23, 33, 43, 53) is provided at the mutually facing outer surfaces of the planes (21, 31, 41, 51).
- Frost-free refrigerating appliance according to one of claims 1 to 4, characterised in that arranged between the planes (31, 41), which are arranged parallel to and one above the other, is a corrugated profile member (36, 46, 47) disposed in heat-conducting contact therewith.
- Frost-free refrigerating appliance according to claim 5, characterised in that a further corrugated profile member (47) is displaced in phase opposition to the corrugated profile member (46) between the two planes (41).
- Frost-free refrigerating appliance according to one of claims 1 to 6, characterised in that the two planes (21, 31, 41) are formed to be of substantially closed area.
- Frost-free refrigerating appliance according to one of claims 1 to 6, characterised in that the two planes (51) have area elements (55) arranged to be set out from the surface thereof.
- Frost-free refrigerating appliance according to claim 8, characterised in that the area elements (55) are arranged to be set out in alternation from the planes (51) and are directed not only into the intermediate space (56) between the two planes (51), but also outwardly remote therefrom.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI9830568T SI0918199T1 (en) | 1997-11-21 | 1998-11-20 | Refrigerator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19751768A DE19751768A1 (en) | 1997-11-21 | 1997-11-21 | Evaporator |
DE19751768 | 1997-11-21 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0918199A2 EP0918199A2 (en) | 1999-05-26 |
EP0918199A3 EP0918199A3 (en) | 2000-04-05 |
EP0918199B1 true EP0918199B1 (en) | 2003-08-27 |
Family
ID=7849508
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98122073A Expired - Lifetime EP0918199B1 (en) | 1997-11-21 | 1998-11-20 | Refrigerator |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0918199B1 (en) |
DE (2) | DE19751768A1 (en) |
ES (1) | ES2205365T3 (en) |
SI (1) | SI0918199T1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009047005A1 (en) * | 2009-11-23 | 2011-08-04 | BSH Bosch und Siemens Hausgeräte GmbH, 81739 | Heat exchanger with a refrigerant channel |
DE102009047003A1 (en) * | 2009-11-23 | 2011-09-22 | BSH Bosch und Siemens Hausgeräte GmbH | Refrigerating appliance with a rollbond arrangement |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4808732B2 (en) * | 2004-12-22 | 2011-11-02 | シユテイーベル・エルトロン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング・ウント・コンパニー・コマンデイトゲゼルシヤフト | Heat exchanger and heat pump circuit |
DE102010028177A1 (en) | 2010-04-26 | 2011-10-27 | BSH Bosch und Siemens Hausgeräte GmbH | Pipe holder for a pipe of a heat exchanger |
KR20150001030A (en) * | 2013-06-26 | 2015-01-06 | 삼성전자주식회사 | Condenser and Refrigerator having the same |
SI25298A (en) * | 2016-10-07 | 2018-04-30 | TALUM d.d. KidriÄŤevo | Heat exchanger |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2063646A (en) * | 1933-06-27 | 1936-12-08 | Gen Electric | Cooling unit |
US3081608A (en) * | 1959-04-23 | 1963-03-19 | Westinghouse Electric Corp | Frozen food compartment for domestic refrigerator |
US3712372A (en) * | 1971-03-01 | 1973-01-23 | Oilin Corp | Method and apparatus for deforming a flat on parts of metal strip-type tubing while leaving other parts undeformed |
DE2516156A1 (en) * | 1975-04-14 | 1976-10-28 | Buderus Eisenwerk | Refrigerating container for coupling to external refrigerator - has lightweight construction with refrigerant evaporator plate and selffllf sealing couplings |
DE7731904U1 (en) * | 1976-10-22 | 1978-02-09 | Castel Mac S.P.A., Castelfranco Veneto, Treviso (Italien) | REFRIGERATED DISPLAY FOR FOOD TO BE ENJOYED COLD |
FR2437595A1 (en) * | 1978-09-27 | 1980-04-25 | Applic Gaz Sa | TEMPERATURE EXCHANGER AND REFRIGERATOR COMPRISING SUCH A DEVICE |
DE3104775A1 (en) * | 1981-02-11 | 1982-09-02 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | "DEVICE FOR THE USE OF AMBIENT ENERGY FOR HEATING" |
FR2502763A2 (en) * | 1981-03-30 | 1982-10-01 | Bernier Jacques | Heat pump for domestic use - has external air-to-liquid evaporator and underfloor condenser |
JPS60191190A (en) * | 1984-03-12 | 1985-09-28 | Nippon Alum Mfg Co Ltd:The | Heat exchanger |
JPH0651758U (en) * | 1990-03-13 | 1994-07-15 | 三星電子株式会社 | Evaporator structure for refrigerator |
US5375655A (en) * | 1993-03-31 | 1994-12-27 | Lee; Yong N. | Heat sink apparatus |
-
1997
- 1997-11-21 DE DE19751768A patent/DE19751768A1/en not_active Withdrawn
-
1998
- 1998-11-20 ES ES98122073T patent/ES2205365T3/en not_active Expired - Lifetime
- 1998-11-20 SI SI9830568T patent/SI0918199T1/en unknown
- 1998-11-20 DE DE59809407T patent/DE59809407D1/en not_active Expired - Lifetime
- 1998-11-20 EP EP98122073A patent/EP0918199B1/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009047005A1 (en) * | 2009-11-23 | 2011-08-04 | BSH Bosch und Siemens Hausgeräte GmbH, 81739 | Heat exchanger with a refrigerant channel |
DE102009047003A1 (en) * | 2009-11-23 | 2011-09-22 | BSH Bosch und Siemens Hausgeräte GmbH | Refrigerating appliance with a rollbond arrangement |
Also Published As
Publication number | Publication date |
---|---|
EP0918199A3 (en) | 2000-04-05 |
SI0918199T1 (en) | 2004-04-30 |
DE59809407D1 (en) | 2003-10-02 |
ES2205365T3 (en) | 2004-05-01 |
EP0918199A2 (en) | 1999-05-26 |
DE19751768A1 (en) | 1999-05-27 |
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