EP1110040B1 - Refrigerator with evaporator plate - Google Patents

Refrigerator with evaporator plate Download PDF

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Publication number
EP1110040B1
EP1110040B1 EP99944527A EP99944527A EP1110040B1 EP 1110040 B1 EP1110040 B1 EP 1110040B1 EP 99944527 A EP99944527 A EP 99944527A EP 99944527 A EP99944527 A EP 99944527A EP 1110040 B1 EP1110040 B1 EP 1110040B1
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EP
European Patent Office
Prior art keywords
plate
evaporator
evaporator plate
end sections
refrigerant channel
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
Application number
EP99944527A
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German (de)
French (fr)
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EP1110040A1 (en
Inventor
Wolfgang Nuiding
Walter Lipp
Walter Holz
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP1110040A1 publication Critical patent/EP1110040A1/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00Evaporators; Condensers
    • F25B39/02Evaporators
    • F25B39/022Evaporators with plate-like or laminated elements
    • F25B39/024Evaporators with plate-like or laminated elements with elements constructed in the shape of a hollow panel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/01Geometry problems, e.g. for reducing size

Definitions

  • the invention relates to a refrigerator with an evaporator plate according to the preamble of claim 1, known from DE-A-19506904 ,
  • evaporator plate which is designed either as a so-called cold wall evaporator or as an indoor evaporator.
  • a coolant channel meandering from the height of the evaporator plate, starting from a refrigerant injection point arranged in the installed position of the evaporator plate at its upper end, and to supply the end of the refrigerant channel to a refrigerant suction point on the evaporator plate
  • Type of refrigerant channel guide entails that the lower end remote from the injection point in the mounting position of the evaporator plate with respect to the time from which set the refrigerant compressor in operation and thus the refrigerant channel is supplied on the evaporator circuit with liquid refrigerant, is significantly delayed cooling.
  • the invention has the object to improve an evaporator plate according to the preamble of claim 1 with simple constructive measures such that the disadvantages of the prior art are avoided.
  • the path of the refrigerant channel from the injection point to one of the surface end sections is particularly short, because the injection point situated upstream of the coolant channel is arranged within one of the two opposite surface end sections traversed by the coolant channel. Due to the minimized refrigerant channel guide from the injection point to one of theinstitunendabitese both provided with the injection point mecanicnendabêt as the oppositeêtnendabterrorism is very quickly with liquid refrigerant acted upon and thus cooled extremely quickly.
  • the injection point with the adjoining refrigerant channel can be arranged within the mounting end of the evaporator plate higher lying ceremonynendabiteses.
  • a cooling compartment of a refrigerator is cooled down particularly rapidly to the intended temperature when the evaporator plate has a rectangular blank and the narrower sides of the circuit board are essentially horizontal in the installed position of the evaporator plate, wherein the injection point is arranged within one of the surface end sections formed by the narrower sides of the sinker.
  • the evaporator plate can be produced if, according to a preferred embodiment of the subject matter of the invention, the evaporator plate is produced by the roll-bonding method or by the Z-bonding method.
  • an evaporator plate 10 produced according to the rollbond method which has a front view rectangular blank, the narrower sides of the rectangle associated circuit board sections serve asurbannendabête 11 and 12, which in dependence the height of the evaporator plate have a variable height h and which are referred to as so-called input or output of the evaporator plate.
  • the opposing surface end portions 11 and 12 which receive a middle board section 13 between them, in the installed position of the evaporator plate 10 in a not shown refrigerator higher lying felicitnendabêt 11 provided with an injection point 14 for refrigerant.
  • a refrigerant channel 15 is fluidly connected, which passes through the overheadassinendabites 11 in the present case in the manner of a loop and which is transferred at the end of the loop of this mecanicnendabrough 11 in the installation position of the evaporator plate 10 lying below the bottom end portion 12.
  • the refrigerant passage 12 extends in a meandering manner over the height of the central sinker section 13, before it is connected on the output side to a suction point 16 provided on the surface section 11.
  • Fig. 2 shows how Fig. 1 in a simplified schematic representation of a second embodiment of a rectangular blank having evaporator plate 20, whose the narrower sides of their rectangle facing edges serve as professionnendabterrorisme 21 and 22, which have a different height h depending on the height of the evaporator plate ,
  • a middle board portion 23 is provided, which is significantly enlarged in terms of its area with respect to the surface of theinstitunendabête 21 and 22.
  • the sinker section 23 has an approximately centrally located to its height refrigerant injection point 24, to which a refrigerant passage 25 is fluidly connected.
  • the refrigerant channel 25 extends into a refrigerant suction point 26 arranged within the sinker section 23.
  • the minimally imminent direct transfer from the refrigerant injection point 24 located in the middle sinker section 23 into the adjacent end section 21 becomes the first and short interval thereafter with the facing end section 22 liquid refrigerant is applied and thus cooled, while the central board portion 23 is acted upon only after the proceedingsnendabête 21 and 22 with liquid refrigerant.
  • the central board section 23 experiences a kind of precooling effect, which is brought about by the heat conduction of the aluminum evaporator plate 20 produced, for example, by the rollbond method.
  • FIG. 3 shows a coordinate system for illustrating evaporator surface temperatures in evaporator plates according to the prior art.
  • the surface temperature in ° C of the evaporator plate is plotted on the ordinate and the time t in minutes on the abscissa.
  • the curve of the surface temperature measured at the evaporator entrance differs significantly from the curve determined for the surface temperature at the evaporator exit (corresponding to the bottom end section), the surface temperature at the evaporator exit being close to zero has the magnitude of the temperature at the evaporator inlet at the end of the compressor run time.
  • the graph of FIG. 4 shows in curves the course of the surface temperature at the output or input of an evaporator plate according to the invention.
  • the surface temperature of the evaporator plate is also plotted over the compressor running time.
  • the curve determined for the surface temperatures at the evaporator inlet or at the evaporator outlet follows as far as possible the curve, which was determined on the input side of the evaporator plate.
  • the leadership of the refrigerant channel 15 and 25 is the corresponding refrigeration demand at the solicitnendabêten 11 and 12 or 21 and25 adaptable.

Abstract

The invention relates to an evaporator plate (10), such as a backplate evaporator for mounting in a cooling chamber of a refrigerator or similar, comprising an injection point (14) for the refrigerant and an adjoining refrigerant channel (15). Said refrigerant channel extends across the surface of the evaporator plate (10) and joins the evaporator plate (10) at a suction point (16). After the injection point (14), the refrigerant channel leads to one of the flat end sections (11) which are situated at least adjacently to the injection point and extends inside said section. The refrigerant channel (15) then leads from this flat end section (11) into the flat end section opposite (12) and runs through the latter before passing through the intermediate section (13) between the two flat end sections.

Description

Die Erfindung betrifft einen Kühlschrank mit einer Verdampferplatine gemäß Oberbegriff von Anspruch 1, bekannt aus DE-A-19506904 .The invention relates to a refrigerator with an evaporator plate according to the preamble of claim 1, known from DE-A-19506904 ,

Bei Kühlschränken ist es Stand der Technik, zur Kühlung von deren Kühlraum an der Rückwand des Kühlraumes eine Verdampferplatine vorzusehen, welche entweder als sogenannter Cold-Wall-Verdampfer oder aber auch als Innenraumverdampfer ausgeführt ist. Bei diesen, häufig die gesamte Höhe der Rückwand einnehmenden Verdampfern ist es üblich, ausgehend von einer in Einbaulage der Verdampferplatine an deren oberem Ende angeordneten Kältemitteleinspritzstelle einen Kältemittelkanal mäanderförmig über die Höhe der Verdampferplatine zu führen und das Ende des Kältemittelkanals einer Kältemittelabsaugstelle an der Verdampferplatine zuzuführen Diese Art von Kältemittelkanalführung bringt mit sich, daß das entfernt von der Einspritzstelle liegende untere Ende in Einbaulage der Verdampferplatine bezüglich des Zeitpunktes, von dem ab der Kältemittelverdichter in Betrieb gesetzt und somit der Kältemittelkanal auf der Verdampferplatine mit flüssigem Kältemittel versorgt ist, deutlich verzögert gekühlt wird. Dieser unerwünschte Effekt tritt um so stärker zutage, je höher die Verdampferplatine ausgeführt ist, oder je größer die Kanallänge des Kältemittelkanals bemessen ist bzw. je intensiver der Wärmeaustausch an der Verdampferoberfläche erfolgt. Letztendlich führt dieser Effekt dazu, daß die bestimmungsgemäße Oberflächentemperatur an der Verdampferplatine an deren Ausgang, im Vergleich zu deren Eingang, zeitlich deutlich später erfolgt, wodurch infolge der nicht unerheblich längeren Verdichterlaufzeit der Energieverbrauch des Gerätes nachteilig beeinflußt ist.In refrigerators, it is state of the art to provide for the cooling of the cooling space on the rear wall of the refrigerator an evaporator plate, which is designed either as a so-called cold wall evaporator or as an indoor evaporator. In these evaporators, which frequently occupy the entire height of the rear wall, it is customary to lead a coolant channel meandering from the height of the evaporator plate, starting from a refrigerant injection point arranged in the installed position of the evaporator plate at its upper end, and to supply the end of the refrigerant channel to a refrigerant suction point on the evaporator plate Type of refrigerant channel guide entails that the lower end remote from the injection point in the mounting position of the evaporator plate with respect to the time from which set the refrigerant compressor in operation and thus the refrigerant channel is supplied on the evaporator circuit with liquid refrigerant, is significantly delayed cooling. This undesirable effect is more pronounced, the higher the evaporator plate is designed, or the greater the channel length of the refrigerant channel is dimensioned or the more intense the heat exchange takes place at the evaporator surface. Ultimately, this effect causes the intended surface temperature at the evaporator plate at the output, compared to their input, takes place much later in time, which is adversely affected as a result of not insignificantly longer compressor run time of the power consumption of the device.

Der Erfindung liegt die Aufgabe zugrunde, eine Verdampferplatine gemäß dem Oberbegriff des Anspruches 1 mit einfachen konstruktiven Maßnahmen derart zu verbessern, daß die Nachteile des Standes der Technik vermieden sind.The invention has the object to improve an evaporator plate according to the preamble of claim 1 with simple constructive measures such that the disadvantages of the prior art are avoided.

Diese Aufgabe wird gemäß der Erfindung durch die Merkmale von Anspruch 1 gelöst.This object is achieved according to the invention by the features of claim 1.

Durch die erfindungsgemäße Anordnung des Kältemittelkanals auf der Fläche der Verdampferplatine ist diese zumindest weitestgehend gleichzeitig an ihren einander gegenüberliegenden Flächenendabschnitten mit flüssigem Kältemittel beaufschlagt und somit gekühlt, wodurch der zwischen den Flächenendabschnitten liegende Zwischenabschnitt durch die wärmeleitenden Eigenschaften der Verdampferplatine vorgekühlt ist. Dies hat zur Folge, daß die gesamte Fläche der Verdampferplatine deutlich rascher gleichmäßig abgekühlt ist, wodurch sich die Verdichterlaufzeiten deutlich verkürzen und somit der Energieverbrauch eines Kühlschrankes durch die wesentlich effektivere Beaufschlagung der Verdampferfläche mit flüssigem Kältemittel deutlich herabgesetzt ist. Die verzögerte Abkühlung des abseits der Kältemitteleinspritzstelle liegenden Endes des Verdampfers ist durch die Kältemittelkanalführung von einem Flächenendabschnitt direkt zu dem gegenüberliegenden Flächenendabschnitt im wesentlichen vermieden.Due to the inventive arrangement of the refrigerant channel on the surface of the evaporator plate this is at least largely simultaneously applied to their opposite Flächenendabschnitten with liquid refrigerant and thus cooled, whereby the lying between the Flächenendabschnitten intermediate section is pre-cooled by the heat-conducting properties of the evaporator plate. This has the consequence that the entire surface of the evaporator plate is cooled much more uniformly, which significantly shorten the compressor running times and thus the energy consumption of a refrigerator is significantly reduced by the much more effective exposure of the evaporator surface with liquid refrigerant. The delayed cooling of the remote from the refrigerant injection point end of the evaporator is substantially avoided by the refrigerant channel guide from a Flächenendabschnitt directly to the opposite Flächenendabschnitt.

Besonders kurz ist der Weg des Kältemittelkanals von der Einspritzstelle zu einem der Flächenendabschnitte, weil die dem Kältemittelkanal vorgelagerte Einspritzstelle innerhalb eines der beiden einander gegenüberliegenden, von dem Kältemittelkanal durchzogenen Flächenendabschnitte angeordnet ist. Durch die minimierte Kältemittelkanalführung von der Einspritzstelle zu einem der Flächenendabschnitte ist sowohl der mit der Einspritzstelle versehene Flächenendabschnitt wie der dazu gegenüberliegende Flächenendabschnitt sehr rasch mit flüssigem Kältemittel beaufschlagbar und somit äußerst rasch gekühlt. Ferner ist durch diese Maßnahme erreicht, daß die beiden einander gegenüberliegenden Flächenendabschnitte der Verdampferplatine mit nur geringer zeitlicher Verzögerung im wesentlichen gleiches Temperaturniveau erreichen und somit aufgrund der von der Verdampferplatine auftretenden Wärmeleitung zumindest annähernd gleichmäßig zur Kühlung des zwischen den beiden Flächenendabschnitten liegenden mittleren Zwischenabschnitts der Verdampferplatine zu kühlen beitragen.The path of the refrigerant channel from the injection point to one of the surface end sections is particularly short, because the injection point situated upstream of the coolant channel is arranged within one of the two opposite surface end sections traversed by the coolant channel. Due to the minimized refrigerant channel guide from the injection point to one of the Flächenendabschnitte both provided with the injection point Flächenendabschnitt as the opposite Flächenendabschnitt is very quickly with liquid refrigerant acted upon and thus cooled extremely quickly. Furthermore, it is achieved by this measure that reach the two opposite Flächenendabschnitte the evaporator plate with only a slight time delay substantially the same temperature level and thus due to the heat transfer occurring from the evaporator plate at least approximately uniformly for cooling the lying between the two Flächenendabschnitten middle intermediate portion of the evaporator plate contribute cool.

Die Einspritzstelle mit dem sich daran anschließenden Kältemittelkanal kann innerhalb des in Einbaulage der Verdampferplatine höher liegenden Flächenendabschnittes angeordnet sein.The injection point with the adjoining refrigerant channel can be arranged within the mounting end of the evaporator plate higher lying Flächenendabschnittes.

Durch die Anordnung der Kältemitteleinspritzstelle innerhalb des in Einbaulage der Verdampferplatine oben liegenden Endabschnittes wird dieser rascher abgekühlt als der gegenüberliegende unten liegende Endabschnitt, wodurch sich durch diese Maßnahme bereits kurzzeitig nach der Beaufschlagung des höher liegenden Flächenendabschnittes der Verdampferplatine eine natürliche Konvektion innerhalb des Kühlraumes eines Kühlschrankes herausbildet und zu einer rascheren Luftdurchmischung innerhalb des Kühlraumes beiträgt. Darüber hinaus ist die Geräuschbildung durch das zwangsweise anhand des Kältemittelverdichters umgewälzte Kältemittel, welches sowohl in flüssiger als auch in gasförmiger Form innerhalb des Kältemittelkanals vorliegt, nicht unerheblich gemindert.Due to the arrangement of the refrigerant injection point within the upper end portion in the installation position of the evaporator plate this is cooled more rapidly than the opposite underlying end portion, which forms a natural convection within the refrigerator of a refrigerator by this measure already briefly after the application of the higher lying Flächenendabschnittes the evaporator plate and contributes to a faster air mixing within the refrigerator. In addition, the noise generated by the forcibly circulated on the basis of the refrigerant compressor refrigerant, which is present both in liquid and in gaseous form within the refrigerant channel, not insignificantly reduced.

Besonders rasch auf die bestimmungsgemäße Temperatur herabgekühlt ist ein Kühlraum eines Kühlschrankes, wenn die Verdampferplatine einen rechteckförmigen Zuschnitt aufweist und die schmäleren Platinenseiten in Einbaulage der Verdampferplatine im wesentlichen horizontal verlaufen, wobei die Einspritzstelle innerhalb einer der durch die schmäleren Platinenseiten gebildeten Flächenendabschnitte angeordnet ist.A cooling compartment of a refrigerator is cooled down particularly rapidly to the intended temperature when the evaporator plate has a rectangular blank and the narrower sides of the circuit board are essentially horizontal in the installed position of the evaporator plate, wherein the injection point is arranged within one of the surface end sections formed by the narrower sides of the sinker.

Großseriengerecht besonders kostengünstig erstellbar ist die Verdampferplatine, wenn nach einer bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß die Verdampferplatine nach dem Rollbond-Herstellverfahren oder nach dem Z-Bond-Herstellverfahren gefertigt ist.Especially suitable for mass production, the evaporator plate can be produced if, according to a preferred embodiment of the subject matter of the invention, the evaporator plate is produced by the roll-bonding method or by the Z-bonding method.

Die Erfindung ist in der nachfolgenden Beschreibung anhand eines in der beigefügten Zeichnung vereinfacht schematisch dargestellten Ausführungsbeispieles erläutert. Es zeigen:

Fig. 1
in einem ersten Ausführungsbeispiel eine vereinfachte schematische Darstellung einer rechteckförmigen Verdampferplatine, mit an ihrer in Einbaulage höher liegenden Platinenseite vorgesehenen Einspritzstelle, in Ansicht von vorne,
Fig. 2
in einem zweiten Ausführungsbeispiel vereinfacht schematisch dargestellt eine rechteckförmige Verdampferplatine, mit einer etwa auf halber Platinenhöhe angeordneten Einspritzstelle,
Fig. 3
ein erstes Schaubild zur Darstellung des Temperaturverlaufes am Ausgang bzw. Eingang einer nach dem Stand der Technik gefertigten Verdampferplatine und
Fig. 4
ein zweites Schaubild zur Darstellung des Temperaturverlaufes am Eingang bzw. Ausgang einer erfindungsgemäßen Verdampferplatine.
The invention is explained in the following description with reference to an embodiment schematically illustrated in the accompanying drawing schematically. Show it:
Fig. 1
in a first embodiment, a simplified schematic representation of a rectangular evaporator plate, with provided at its mounting side higher board side injection point, in front view,
Fig. 2
schematically illustrated in a second embodiment, a rectangular evaporator plate, with an arranged approximately at half board height injection point,
Fig. 3
a first graph showing the temperature profile at the output or input of a manufactured according to the prior art evaporator plate and
Fig. 4
a second graph showing the temperature profile at the entrance or exit of an evaporator plate according to the invention.

In Fig. 1 ist gemäß einem ersten Ausführungsbeispiel vereinfacht schematisch beispielsweise eine nach dem Rollbond-Verfahren hergestellte Verdampferplatine 10 gezeigt, welche einen in Ansicht von vorne rechteckförmigen Zuschnitt aufweist, dessen den schmäleren Rechteckseiten zugeordnete Platinenabschnitte als Flächenendabschnitte 11 bzw. 12 dienen, welche in Abhängigkeit der Höhe der Verdampferplatine eine variable Höhe h aufweisen und welche als sogenannter Eingang bzw. Ausgang der Verdampferplatine bezeichnet sind. Von den einander gegenüberliegenden Flächenendabschnitten 11 und 12, welche zwischen sich einen mittleren Platinenabschnitt 13 aufnehmen, ist der in Einbaulage der Verdampferplatine 10 in einem nicht gezeigten Kühlschrank höherliegende Flächenendabschnitt 11 mit einer Einspritzstelle 14 für Kältemittel versehen. Mit der Einspritzstelle 14 ist ein Kältemittelkanal 15 strömungstechnisch verbunden, welcher den obenliegenden Flächenendabschnitt 11 im vorliegenden Fall in Art einer Schleife durchzieht und welcher am Ende der Schleife von diesem Flächenendabschnitt 11 in den in Einbaulage der Verdampferplatine 10 unten liegenden Flächenendabschnitt 12 übergeführt ist. Innerhalb des Flächenendabschnittes 12 ist der Kältemittelkanal 15, wie im Flächenendabschnitt 11, in der Art einer Schleife verlaufend angeordnet und am Schleifenende dem mittleren Platinenabschnitt 13 zugeführt. Innerhalb des mittleren Platinenabschnittes 13 verläuft der Kältemittelkanal 12 mäanderartig über die Höhe des mittleren Platinenabschnittes 13, bevor er ausgangsseitig an eine am Flächenabschnitt 11 vorgesehene Absaugstelle 16 angeschlossen ist. Durch die Anordnung des Kältemittelkanals 15 auf der Verdampferplatine 10 ist in einem ersten Schritt der obenliegende Flächenendabschnitt 11 mit flüssigem Kältemittel beaufschlagt. Im Anschluß an diese Beaufschlagung ist das flüssige Kältemittel unmittelbar dem tieferliegenden Flächenendabschnitt 12 zugeführt, bevor es in den mittleren Platinenabschnitt 13 übertritt. Diese Art der Kältemittelkanalführung stellt sicher, daß zuerst das eingangsseitige Platinenende der Verdampferplatine 10 und mit geringem zeitlichem Versatz im Anschluß daran deren ausgangsseitiges Ende mit flüssigem Kältemittel beaufschlagt und somit gekühlt ist, während erst im Anschluß daran der zwischen den beiden Flächenendabschnitten 11 und 12 liegende mittlere Platinenabschnitt 13 mit flüssigem Kältemittel beaufschlagt und somit gekühlt ist.In FIG. 1, according to a first exemplary embodiment, schematically simplified, for example, an evaporator plate 10 produced according to the rollbond method is shown, which has a front view rectangular blank, the narrower sides of the rectangle associated circuit board sections serve as Flächenendabschnitte 11 and 12, which in dependence the height of the evaporator plate have a variable height h and which are referred to as so-called input or output of the evaporator plate. Of the opposing surface end portions 11 and 12, which receive a middle board section 13 between them, in the installed position of the evaporator plate 10 in a not shown refrigerator higher lying Flächenendabschnitt 11 provided with an injection point 14 for refrigerant. With the injection point 14, a refrigerant channel 15 is fluidly connected, which passes through the overhead Flächenendabschnitt 11 in the present case in the manner of a loop and which is transferred at the end of the loop of this Flächenendabschnitt 11 in the installation position of the evaporator plate 10 lying below the bottom end portion 12. Within the Flächenendabschnittes 12, the refrigerant channel 15, as in the Flächenendabschnitt 11, arranged running in the manner of a loop and fed at the loop end of the middle board section 13. Within the central sinker section 13, the refrigerant passage 12 extends in a meandering manner over the height of the central sinker section 13, before it is connected on the output side to a suction point 16 provided on the surface section 11. Due to the arrangement of the refrigerant channel 15 on the evaporator plate 10, the overhead surface end section 11 is acted upon with liquid refrigerant in a first step. Subsequent to this admission, the liquid refrigerant is supplied directly to the deeper Flächenendabschnitt 12 before it passes into the middle board section 13. This type of refrigerant channel guide ensures that first the input-side board end of the evaporator plate 10 and with a slight time lag thereafter applied to the output side end of liquid refrigerant and thus cooled, while only then thereafter lying between the two Flächenendabschnitten 11 and 12 middle Board section 13 is acted upon by liquid refrigerant and thus cooled.

Fig. 2 zeigt wie Fig. 1 in vereinfachter schematischer Darstellung eine zweite Ausführungsform einer einen rechteckförmigen Zuschnitt aufweisenden Verdampferplatine 20, deren den schmäleren Rechteckseiten ihres Zuschnittes zugewandten Enden als Flächenendabschnitte 21 und 22 dienen, welche in Abhängigkeit der Höhe der Verdampferplatine eine unterschiedliche Höhe h aufweisen. Zwischen den Flächenendabschnitten 21 und 22, von denen der erstere in Einbaulage der Verdampferplatine 20 in einem nicht gezeigten Kühlschrank obenliegend angeordnet ist, ist ein mittlerer Platinenabschnitt 23 vorgesehen, welcher hinsichtlich seiner Fläche bezüglich der Fläche der Flächenendabschnitte 21 und 22 deutlich vergrößert ist. Der Platinenabschnitt 23 weist eine etwa mittig zu seiner Höhe liegende Kältemitteleinspritzstelle 24 auf, an welcher ein Kältemittelkanal 25 strömungstechnisch angeschlossen ist. Von der Kältemitteleinspritzstelle 24 aus ist der Kältemittelkanal 25 in einem unmittelbar benachbart zu dieser angeordneten Flächenendabschnitt übergeführt, welcher im vorliegenden Fall der Flächenendabschnitt 21 ist. Der in Einbaulage obenliegende Flächenendabschnitt 21 wird von dem Kältemittelkanal 25 in Art einer Schleife durchzogen, bevor der Kältemittelkanal 25 über den mittleren Platinenabschnitt 23 unmittelbar dem in Einbaulage der Verdampferplatine 10 tieferliegenden Flächenendabschnitt 22 zugeführt ist. Diesen durchläuft der Kältemittelkanal 25 ebenso in Art einer Schleife, bevor er in den mittleren Platinenabschnitt 23 zu dessen Kühlung übergeführt ist und innerhalb diesem schleifenähnlich über die Höhe des Platinenabschnittes 23 verläuft. Der Kältemittelkanal 25 mundet in einer innerhalb des Platinenabschnittes 23 angeordneten Kältemittelabsaugstelle 26. Durch die wegmäßig minimierte unmittelbare Überleitung von der im mittleren Platinenabschnitt 23 liegenden Kältemitteleinspritzstelle 24 in den dazu benachbarten Flächenendabschnitt 21 wird dieser zuerst und in kurzem zeitlichem Abstand darauf der dazu gegenuberliegende Flächenendabschnitt 22 mit flüssigem Kältemittel beaufschlagt und somit gekühlt, während der mittlere Platinenabschnitt 23 erst im Anschluß an die Flächenendabschnitte 21 und 22 mit flüssigem Kältemittel beaufschlagt ist. Durch die vorrangige Kühlung der außen liegenden Flächenendabschnitte 21 und 22 erfährt der mittlere Platinenabschnitt 23 eine Art Vorkühleffekt, welcher durch die Wärmeleitung der beispielsweise im Rollbond-Verfahren hergestellten Aluminiumverdampferplatine 20 bewirkt ist.Fig. 2 shows how Fig. 1 in a simplified schematic representation of a second embodiment of a rectangular blank having evaporator plate 20, whose the narrower sides of their rectangle facing edges serve as Flächenendabschnitte 21 and 22, which have a different height h depending on the height of the evaporator plate , Between the Flächenendabschnitten 21 and 22, of which the former is arranged overhead in the installed position of the evaporator plate 20 in a refrigerator, not shown, a middle board portion 23 is provided, which is significantly enlarged in terms of its area with respect to the surface of the Flächenendabschnitte 21 and 22. The sinker section 23 has an approximately centrally located to its height refrigerant injection point 24, to which a refrigerant passage 25 is fluidly connected. From the refrigerant injection point 24 off the refrigerant passage 25 is transferred in a directly adjacent to this arranged Flächenendabschnitt, which is the Flächenendabschnitt 21 in the present case. The overhead in the installation position Flächenendabschnitt 21 is traversed by the refrigerant passage 25 in the manner of a loop, before the refrigerant passage 25 is supplied via the middle board portion 23 directly to the underlying installation position of the evaporator plate 10 Flächenendabschnitt 22. This passes through the refrigerant passage 25 also in the manner of a loop before it is converted into the middle board section 23 to its cooling and within this runs loop-like over the height of the board section 23. The refrigerant channel 25 extends into a refrigerant suction point 26 arranged within the sinker section 23. The minimally imminent direct transfer from the refrigerant injection point 24 located in the middle sinker section 23 into the adjacent end section 21 becomes the first and short interval thereafter with the facing end section 22 liquid refrigerant is applied and thus cooled, while the central board portion 23 is acted upon only after the Flächenendabschnitte 21 and 22 with liquid refrigerant. As a result of the priority cooling of the outer surface end sections 21 and 22, the central board section 23 experiences a kind of precooling effect, which is brought about by the heat conduction of the aluminum evaporator plate 20 produced, for example, by the rollbond method.

Fig. 3 zeigt ein Koordinatensystem zur Veranschaulichung der Verdampferoberflächentemperaturen bei Verdampferplatinen nach dem Stand der Technik. In diesem Koordinatensystem ist die Oberflächentemperatur in °C der Verdampferplatine auf der Ordinate und die Zeit t in Minuten auf der Abszisse aufgetragen. Wie aus dem Schaubild deutlich ersichtlich ist, unterscheidet sich der Kurvenzug der am Verdampfereingang (entspricht dem obenliegenden Flächenendabschnitt) gemessenen Oberflächentemperatur deutlich von dem Kurvenzug, welcher für die Oberflächentemperatur am Verdampferausgang (entspricht dem untenliegenden Flächenendabschnitt) ermittelt wurde, wobei die Oberflächentemperatur am Verdampferausgang erst nahezu am Ende der Verdichterlaufzeit die Größenordnung der Temperatur am Verdampfereingang aufweist.FIG. 3 shows a coordinate system for illustrating evaporator surface temperatures in evaporator plates according to the prior art. In this coordinate system, the surface temperature in ° C of the evaporator plate is plotted on the ordinate and the time t in minutes on the abscissa. As can be clearly seen from the graph, the curve of the surface temperature measured at the evaporator entrance (corresponding to the overhead end section) differs significantly from the curve determined for the surface temperature at the evaporator exit (corresponding to the bottom end section), the surface temperature at the evaporator exit being close to zero has the magnitude of the temperature at the evaporator inlet at the end of the compressor run time.

Im Gegensatz dazu zeigt das Schaubild gemäß Fig. 4 in Kurvenzügen den Verlauf der Oberflächentemperatur am Ausgang bzw. Eingang einer erfindungsgemäßen Verdampferplatine. Wie schon im Schaubild gemäß Fig. 3 ist auch hier die Oberflächentemperatur der Verdampferplatine über der Verdichterlaufzeit aufgetragen. Wie die für die Oberflächentemperaturen am Verdampfereingang bzw. am Verdampferausgang ermittelten Kurvenzüge verdeutlichen, folgt der für die Oberflächentemperatur am Verdampferausgang ermittelte Kurvenzug weitestgehend dem Kurvenzug, welcher eingangsseitig an der Verdampferplatine ermittelt wurde. Im Vergleich der beiden Schaubilder wird deutlich, daß nach halber Verdichterlaufzeit sich an der Oberfläche des Ausganges herkömmlicher Verdampferplatinen kaum eine meßbare Abkühlung ergeben hat, während die Oberflächentemperatur des ausgangsseitigen Endes der erfindungsgemäßen Verdampfer im wesentlichen die Abkühlung erfahren hat, wie sie eingangsseitig bei der erfindungsgemäßen Verdampferplatine auftritt. Eine derart gleichmäßige Abkühlung der erfindungsgemäßen Verdampferplatine hat auch einen deutlich vergleichmäßigteren Wärmeaustausch über die Gesamthöhe der Verdampferplatine zur Folge, wodurch die Temperaturschichtung innerhalb eines zu kühlenden Kühlraumes eines Kühlschrankes zumindest deutlich vermindert, wenn nicht sogar vermieden ist.In contrast, the graph of FIG. 4 shows in curves the course of the surface temperature at the output or input of an evaporator plate according to the invention. As in the diagram according to FIG. 3, the surface temperature of the evaporator plate is also plotted over the compressor running time. As illustrated by the curves determined for the surface temperatures at the evaporator inlet or at the evaporator outlet, the curve determined for the surface temperature at the evaporator outlet follows as far as possible the curve, which was determined on the input side of the evaporator plate. In the comparison of the two graphs it becomes clear that after half the compressor run time hardly any measurable cooling has occurred on the surface of the exit of conventional evaporator plates, while the surface temperature of the exit end of the evaporator according to the invention has essentially undergone cooling, as on the input side in the evaporator plate according to the invention occurs. Such uniform cooling of the evaporator plate according to the invention also results in a much more uniform heat exchange over the entire height of the evaporator plate, whereby the temperature stratification within a refrigerated refrigerator compartment of a refrigerator at least significantly reduced, if not avoided.

Im Abänderung der in Fig. 1 dargestellten Verdampferplatine ist es auch möglich, die im höherliegenden Flächenabschnitt 11 liegende Einspritzstelle 14 in den tieferliegenden Flächenabschnitt 12 zu verlegen. Ferner ist es auch denkbar, die Kältemittelkanalführung der in Fig. 2 dargestellten Verdampferplatine 20 dahingehend abzuändern, daß ausgehend von der mittig liegenden Einspritzstelle 24 zuerst der tieferliegende Flächenendabschnitt 22 und mit geringem zeitlichem Versatz danach der höherliegende Flächenendabschnitt 21 mit flüssigem Kältemittel beaufschlagt ist.In the modification of the evaporator plate shown in Fig. 1, it is also possible to move the lying in the higher surface portion 11 injection point 14 in the deeper surface portion 12. Furthermore, it is also conceivable to modify the refrigerant channel guide of the evaporator plate 20 shown in FIG. 2 to the effect that, starting from the centrally located injection point 24, first the lower-lying surface end section 22 and with a slight time offset thereafter the higher-lying surface end section 21 is charged with liquid refrigerant.

Die Führung des Kältemittelkanals 15 bzw. 25 ist dem entsprechenden Kältebedarf an den Flächenendabschnitten 11 und 12 bzw. 21 und25 anpaßbar.The leadership of the refrigerant channel 15 and 25 is the corresponding refrigeration demand at the Flächenendabschnitten 11 and 12 or 21 and25 adaptable.

Claims (6)

  1. Refrigerator with an evaporator plate, such as a rear wall evaporator or the like, with a refrigerant channel which extends over the area of the evaporator plate and which opens at a suction point of the evaporator plate and is led to a plate end section having an injection point, the channel extending within this plate end section, wherein the refrigerant channel is transferred from this plate end section to the plate end section opposite thereto and extends through this before it passes through the plate section lying between the two plate end sections, characterised in that the refrigerant channel (15) passes through the two plate end sections (11, 12; 21, 22) at least in the form of a loop and that the refrigerant channel (15, 25) extends in the individual plate sections (11, 12, 13; 21, 22, 23) in such a manner that the evaporator surface temperature in the two plate end sections (11, 12; 21, 22) has substantially the same course of over time and that the injection point (14) together with the refrigerant channel (15) connected therewith is arranged within the plate end section (11) lying higher in the installation position of the evaporator plate (10) and that the middle plate section (13, 23) lying between the two area end sections (11, 12; 21, 22) is with respect to its area significantly enlarged relative to the area of the area end sections (11, 12; 21, 22).
  2. Refrigerator according to claim 1, characterised in that the channel lengths of the refrigerant channel (15) are dimensioned to be at least substantially at the same length in the two plate end sections (11, 12; 21, 22).
  3. Refrigerator according to claim 1 or 2, characterised in that the plate end sections (11, 12; 21, 22) have the same height h.
  4. Refrigerator according to one of claims 1 to 3, characterised in that the plate end sections (11, 12; 21, 22) have a different height h depending on the height of the evaporator plate (10, 20).
  5. Refrigerator according to one of claims 1 to 4, characterised in that the evaporator plate (10) comprises a rectangular blank and that the narrower plate sides extend substantially horizontally in the installation position of the evaporator plate (10), wherein the injection point (14) is arranged within one of the plate end sections (11, 12) formed by the narrower plate sides.
  6. Refrigerator according to one of claims 1 to 5, characterised in that the evaporator plate (10, 20) is produced according to the rollbond method or according to the Z-bond method.
EP99944527A 1998-09-04 1999-08-26 Refrigerator with evaporator plate Expired - Lifetime EP1110040B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19840412 1998-09-04
DE19840412A DE19840412A1 (en) 1998-09-04 1998-09-04 Evaporator board
PCT/EP1999/006282 WO2000014460A1 (en) 1998-09-04 1999-08-26 Evaporator plate

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EP1110040A1 EP1110040A1 (en) 2001-06-27
EP1110040B1 true EP1110040B1 (en) 2007-10-17

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EP99944527A Expired - Lifetime EP1110040B1 (en) 1998-09-04 1999-08-26 Refrigerator with evaporator plate

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EP (1) EP1110040B1 (en)
AT (1) ATE376157T1 (en)
DE (2) DE19840412A1 (en)
ES (1) ES2296408T3 (en)
IT (1) ITMI991839A1 (en)
PL (1) PL193497B1 (en)
TR (1) TR200100330T2 (en)
WO (1) WO2000014460A1 (en)

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WO2022204581A2 (en) 2021-03-26 2022-09-29 Scholar Rock, Inc. Tgf-beta inhibitors and use thereof
WO2022256723A2 (en) 2021-06-03 2022-12-08 Scholar Rock, Inc. Tgf-beta inhibitors and therapeutic use thereof

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Publication number Priority date Publication date Assignee Title
US2979922A (en) * 1958-06-30 1961-04-18 Gen Motors Corp Refrigerating apparatus
DE9116265U1 (en) * 1991-06-22 1992-09-03 Krupp Vdm Gmbh, 5980 Werdohl, De
DE19506904A1 (en) * 1995-02-28 1996-08-29 Schmoele Gmbh Km Refrigerant evaporator
IT1288846B1 (en) * 1996-02-07 1998-09-25 Cga Comp Gen Allumino Spa ASSEMBLED FOR HEAT EXCHANGE AND RESPECTIVE PROCESS AND PRODUCTION PLANT

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ES2296408T3 (en) 2008-04-16
DE19840412A1 (en) 2000-03-09
ITMI991839A1 (en) 2001-02-26
WO2000014460A1 (en) 2000-03-16
TR200100330T2 (en) 2001-09-21
ITMI991839A0 (en) 1999-08-26
ATE376157T1 (en) 2007-11-15
PL346397A1 (en) 2002-02-11
DE59914528D1 (en) 2007-11-29
EP1110040A1 (en) 2001-06-27
PL193497B1 (en) 2007-02-28

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