EP1042638B1 - Evaporator system - Google Patents

Evaporator system Download PDF

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Publication number
EP1042638B1
EP1042638B1 EP98966381A EP98966381A EP1042638B1 EP 1042638 B1 EP1042638 B1 EP 1042638B1 EP 98966381 A EP98966381 A EP 98966381A EP 98966381 A EP98966381 A EP 98966381A EP 1042638 B1 EP1042638 B1 EP 1042638B1
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EP
European Patent Office
Prior art keywords
evaporator
section
refrigerant
arrangement according
plate
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EP98966381A
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German (de)
French (fr)
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EP1042638A1 (en
Inventor
Detlef Cieslik
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Priority to SI9830222T priority Critical patent/SI1042638T1/en
Publication of EP1042638A1 publication Critical patent/EP1042638A1/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

Definitions

  • the invention relates to an evaporator arrangement with at least two in series connection arranged in series, from a compressor via an injection point with refrigerant acted on evaporators of different cooling capacity, the evaporator lower cooling capacity is formed like a board, while the evaporator is higher Refrigeration capacity is equipped with a pipeline that serves to guide the refrigerant and the evaporator of lower cooling capacity is connected upstream in the series connection.
  • evaporators In the case of fridge and freezer combinations, it is state of the art for cooling the freezer compartment to use so-called box evaporators.
  • evaporators have an angled to a rectangular tube support plate, which on its outer surface is wrapped with a pipeline used to guide refrigerant.
  • the Carrier plate and the pipeline is for the sake of simplification of processing and Heat conduction and made of aluminum for cost reasons, being on the inflow side
  • an intermediate pipe section is fixed by welding, which serves to adapt the material of a choke made of copper, which is soldered to the pipe adapter.
  • the outflow end of the pipeline is with one used for cooling the cooling compartment, for example manufactured in a roll bond process Evaporator board connected to which a connection point on the discharge side a welded aluminum pipe section is provided therein, which again with a suction pipe usually formed from a copper pipe is welded.
  • a cooling evaporator Evaporator board with a so-called used in a freezer
  • tube evaporators also have the consequence that and production-related, different materials are liquid and gas tight with each other to be connected, whereby special welding processes, such as a special type of electrical resistance welding must be used, for which a suitable welding device is quite expensive.
  • the assembly effort of such an evaporator arrangement is due to the large number of the individual connection points to be put together relatively high, with additionally on the workforce places high demands on their work quality and quality is to ensure that the joints fluid and are made gastight.
  • the object of the invention is in an evaporator arrangement according to the preamble of claim 1 with simple structural measures the refrigeration circuit simplify and improve the two single evaporators together.
  • the board-like evaporator lower cooling capacity has a section which with the injection point is equipped for the refrigerant and which is at least largely thermally the remaining board area of the evaporator is decoupled.
  • the Injecting the liquid refrigerant copper pipeline into a roll bond or Z-Bond process produced refrigerant channel insertable and by chipless Deformation of the refrigerant channel, e.g. fixable by embossing liquid and gas tight, without using a machine to produce the injection point for the refrigerant having to provide complex and therefore costly welding processes.
  • the purely mechanical seal offers by deforming the into the board molded refrigerant channel the advantage that the shape and position tolerances between the connection partners can be chosen larger than that between the Connection partner to be performed weld connection would be possible.
  • the section has a refrigerant channel adjoining the injection point, which has a connection area for the pipeline on the output side.
  • connection point between the refrigerant channel and the Pipe can be easily welded, since both the pipe as well as the section with the refrigerant channel made of the same material, e.g. aluminum can be made.
  • a particularly quick and targeted supply of the injected refrigerant into the Pipe of the evaporator higher cooling capacity results if after a next one preferred embodiment of the object of the invention is provided that the Refrigerant channel is formed on the section minimized in length. Furthermore, are unnecessary Cold losses at the evaporator with lower cooling capacity avoided.
  • the section with the residual board area of the evaporator is connected by at least one web-like connecting section, via which the drain-side end of the refrigerant channel arrangement on the remaining board surface at least is led into the vicinity of the injection point.
  • the section and the remaining board area of the evaporator are particularly easy to manufacture lower cooling capacity if according to a next advantageous embodiment the subject of the invention is provided that the web-like connecting portion in one piece with the section and in one piece with the remaining board surface of the evaporator connected is.
  • the one-piece connection of the section also results a particularly exact location assignment to the remaining board surface of the evaporator the former to the latter.
  • the board-like evaporator lower cooling capacity and the section in one piece by cutting from a Manufacture aluminum sheet metal.
  • the residual board area of the evaporator within the thermal insulation a refrigeration device arranged and thermally conductive on an inner panel a cold room provided in the refrigerator is coupled during the section lies outside the thermal insulation.
  • the section provided outside the thermal insulation is a clear one Reduction in the amount of liquid refrigerant injected at the injection point generated noise reached.
  • the evaporator has a higher cooling capacity than a box-like one Evaporator with a carrier plate formed into a tube and the heat-conducting on it Contact coiled pipe is formed.
  • the pipeline can be coupled to the refrigerant channel arrangement particularly securely in a gas-tight and liquid-tight manner of the board-like evaporator, if after a last preferred Embodiment of the subject of the invention is provided that the pipeline discharge side via a connection point on the evaporator board with the refrigerant channel arrangement the remaining board surface of the evaporator is connected.
  • FIG. 1 shows an evaporator arrangement 10 in a simplified, schematic representation with a freezer evaporator 11, which, for example, from an aluminum sheet has shaped support tube 12, on the heat insulation of a refrigerator facing jacket surface 13 is a pipe used to guide refrigerant 14 is applied, which at both ends with a connector 15 and 16 respectively is provided and which consists of an aluminum tube, which in heat-conducting Contact is set on the outer surface 13.
  • a pipe used to guide refrigerant 14 is applied, which at both ends with a connector 15 and 16 respectively is provided and which consists of an aluminum tube, which in heat-conducting Contact is set on the outer surface 13.
  • the former at its free Provide the surface with an aluminum-coated adhesive tape, which is on the outer surface 13 of the support tube 12 is fixed.
  • the carrier tube 12 is on its back equipped with a rear wall 18 made of aluminum sheet, which together with the support tube 12 and the pipe 14 wound thereon as so-called box evaporator designated freezer evaporator 11 forms.
  • a rear wall 18 made of aluminum sheet, which together with the support tube 12 and the pipe 14 wound thereon as so-called box evaporator designated freezer evaporator 11 forms.
  • this is a purely schematically shown in series connection, for example in the roll bond process manufactured cooling compartment evaporator 19, the latter by welding two aluminum sheet blanks produced board-like structure a first board section 20, which is designed as a so-called cold wall evaporator and one has meandering refrigerant channel arrangement 21, which on its inflow side End in a connection point 22 which is also molded onto the circuit board section 20 opens and which has a channel section 23 at its drain-side end.
  • the web-like connecting sections 25 are both in one piece with the circuit board section 20 as well as in one piece with a second, to the refrigerator compartment evaporator 19 associated board section 26, which with respect dimensioned its surface significantly smaller than the surface of the circuit board section 20 and which is substantially rectangular, with one of its longer rectangular sides the connecting sections 25 are connected.
  • the board section 26 has a refrigerant channel running parallel to its longer rectangular sides 27 equipped, which over the entire length of the board section 26 runs and which one at its inflow-side end to the plate section 26 integrally molded joint 28 and also at its drain end to the board section 26 molded joint 29 for insertion below more detailed piping is provided.
  • the refrigerant channel 27 is used on his the connection point 28 facing the inflow section for receiving a for example, made of copper throttle pipe 30, which has one of its ends based on a partial, plastic deformation to form a so-called Embossing point 31 is fixed gas and liquid-tight in the refrigerant channel 27, the free end of the throttle tube 30 serves as an injection point 32 for the liquid refrigerant.
  • the throttle line self-contained intake manifold 33 made of aluminum, for example is fixed in terms of welding technology, there is a connection point 34 for the connection section 25 guided channel section 23 is provided on the refrigerant channel 27.
  • the refrigerant channel 27 opens on the outlet side into the connection point 29, in which for example made of aluminum connecting tube 35 fixed by welding which is used to connect the refrigerant channel 27 to the pipeline 14 whose connector 15 provided on the inflow side is welded. That on the drain side the pipe 14 provided connector 16 also serves to receive a intermediate tube 36 made of aluminum, which on the one hand with the connector 16 and on the other hand welded to the connection point 22 on the circuit board section 20 is.
  • refrigerant compressor not shown forced refrigerant in the liquid state via the throttle tube 30 fed to the injection point 32, which actually refrigeration technically the freezer evaporator 11 would be assigned and which this without noticeable loss of cold over a short refrigerant flow path, formed from the refrigerant channel 27 and the Connection tube 34, is upstream.
  • the refrigerant flows from the injection point 32, symbolically indicated by the arrows, via the refrigerant channel 27, the connecting pipe 34 in the pipeline 14 of the freezer evaporator, where it is on the outlet side End via the intermediate pipe 36 into the downstream cooling compartment evaporator 19.

Description

Die Erfindung betrifft eine Verdampferanordnung mit wenigstens zwei in Reihenschaltung hintereinander angeordneten, von einem Verdichter über eine Einspritzstelle mit Kältemittel beaufschlagten Verdampfem unterschiedlicher Kälteleistung, wobei der Verdampfer geringerer Kälteleistung platinenartig ausgebildet ist, während der Verdampfer höherer Kälteleistung mit einer zur Führung des Kältemittels dienenden Rohrleitung ausgestattet und dem Verdampfer geringerer Kälteleistung in der Reihenschaltung vorgeschaltet ist.The invention relates to an evaporator arrangement with at least two in series connection arranged in series, from a compressor via an injection point with refrigerant acted on evaporators of different cooling capacity, the evaporator lower cooling capacity is formed like a board, while the evaporator is higher Refrigeration capacity is equipped with a pipeline that serves to guide the refrigerant and the evaporator of lower cooling capacity is connected upstream in the series connection.

Bei Kühl- und Gefrierkombinationen ist es Stand der Technik, zur Kühlung des Gefrierfaches sogenannte Kastenverdampfer zum Einsatz zu bringen. Derartige Verdampfer weisen ein zu einem Rechteckrohr abgewinkeltes Trägerblech auf, welches an seiner Mantelfläche mit einer zur Führung von Kältemittel dienenden Rohleitung umwickelt ist. Das Trägerblech und die Rohrleitung ist aus Gründen der Bearbeitungsvereinfachung und Wärmeleitung sowie aus Kostengründen aus Aluminium hergestellt, wobei am zuflußseitigen Ende der Rohrleitung ein Rohrzwischenstück schweißtechnisch festgesetzt ist, welches zur Werkstoffanpassung einer aus Kupfer gefertigten Drosselleitung dient, welche mit dem Rohrzwischenstück verlötet ist. Das ausflußseitige Ende der Rohrleitung ist mit einer zur Kühlung des Kühlfaches dienenden, beispielsweise im Rollbondverfahren hergestellten Verdampferplatine verbunden, an welcher abflußseitig eine Anschlußstelle mit einem schweißtechnisch darin festgesetzten Aluminium-Rohrstück vorgesehen ist, welches wiederum mit einem üblicherweise aus einer Kupferrohrleitung gebildeten Saugrohr verschweißt ist. Eine derartige Vorschaltung einer als Kühifachverdampfer dienenden Verdampferplatine mit einem in einem Gefrierfach zum Einsatz kommenden sogenannten Rohrverdampfer hat neben einer Vielzahl von Einzelbauteilen zudem zur Folge, daß kosten- und fertigungsbedingt unterschiedliche Werkstoffe flüssigkeits- und gasdicht miteinander zu verbinden sind, wodurch spezielle Schweißverfahren, wie beispielsweise eine spezielle Art einer elektrischen Widerstandsschweißung zur Anwendung kommen muß, für welche eine dazu geeignete Schweißvorrichtung ziemlich kostenintensiv ist. Darüber hinaus ist der Montageaufwand einer derartigen Verdampferanordnung durch die Vielzahl der einzelnen zusammenzufügenden Verbindungsstellen relativ hoch, wobei zusätzlich an das Arbeitspersonal eine hohe Anforderung an deren Arbeitsqualität und Arbeitsgüte zu stellen ist, um gewährleisten zu können, daß die Verbindungsstellen flüssigkeits- und gasdicht gefertigt sind.In the case of fridge and freezer combinations, it is state of the art for cooling the freezer compartment to use so-called box evaporators. Such evaporators have an angled to a rectangular tube support plate, which on its outer surface is wrapped with a pipeline used to guide refrigerant. The Carrier plate and the pipeline is for the sake of simplification of processing and Heat conduction and made of aluminum for cost reasons, being on the inflow side At the end of the pipeline, an intermediate pipe section is fixed by welding, which serves to adapt the material of a choke made of copper, which is soldered to the pipe adapter. The outflow end of the pipeline is with one used for cooling the cooling compartment, for example manufactured in a roll bond process Evaporator board connected to which a connection point on the discharge side a welded aluminum pipe section is provided therein, which again with a suction pipe usually formed from a copper pipe is welded. Such an upstream of a serving as a cooling evaporator Evaporator board with a so-called used in a freezer In addition to a large number of individual components, tube evaporators also have the consequence that and production-related, different materials are liquid and gas tight with each other to be connected, whereby special welding processes, such as a special type of electrical resistance welding must be used, for which a suitable welding device is quite expensive. About that In addition, the assembly effort of such an evaporator arrangement is due to the large number of the individual connection points to be put together relatively high, with additionally on the workforce places high demands on their work quality and quality is to ensure that the joints fluid and are made gastight.

Aufgabe der Erfindung ist es, bei einer Verdampferanordnung gemäß dem Oberbegriff des Anspruches 1 mit einfachen konstruktiven Maßnahmen die kältetechnische Verschaltung der beiden Einzelverdampfer miteinander zu vereinfachen und zu verbessern.The object of the invention is in an evaporator arrangement according to the preamble of claim 1 with simple structural measures the refrigeration circuit simplify and improve the two single evaporators together.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß der platinenartige Verdampfer geringerer Kälteleistung einen Abschnitt aufweist, welcher mit der Einspritzstelle für das Kältemittel ausgestattet ist und welcher zumindest weitestgehend thermisch von der restlichen Platinenfläche des Verdampfers entkoppelt ist.This object is achieved according to the invention in that the board-like evaporator lower cooling capacity has a section which with the injection point is equipped for the refrigerant and which is at least largely thermally the remaining board area of the evaporator is decoupled.

Durch die Zuordnung der Einspritzstelle zu dem platinenartigen Verdampfer ist die zum Einspritzen des flüssigen Kältemittels dienende Kupferrohrleitung in einen im Rollbondoder Z-Bondverfahren hergestellten Kältemittelkanal einbringbar und durch spanlose Verformung des Kältemittelkanals, z.B. durch Prägen flüssigkeits- und gasdicht festsetzbar, ohne zur Herstellung der Einspritzstelle für das Kältemittel ein maschinentechnisch aufwendiges und somit kostenintensives Schweißverfahren bereitstellen zu müssen. Darüber hinaus bietet die rein mechanische Abdichtung durch Verformen des in die Platine eingeformten Kältemittelkanals den Vorteil, daß die Form- und Lagetoleranzen zwischen den Verbindungspartnem größer gewählt werden können als dies bei einer zwischen den Verbindungspartner durchzuführenden Schweißverbindung möglich wäre. Femer erübrigt sich, im Gegensatz zu einer Schweißverbindung zwischen den Verbindungspartnem eine ständige Dichtheitsprüfung an der Verbindungsstelle, da das mechanische Verbinden und Abdichten der beiden Verbindungspartner zueinander mit sehr hoher Prozeßsicherheit behaftet ist. Durch die thermische Entkopplung des mit der Einspritzstelle versehenen Abschnitts von der Restplatinenfläche des Verdampfers ist sichergestellt, daß das eingespritzte flüssige Kältemittel nicht bereits an den in Reihenschaltung nachgeschalteten, platinenartig ausgebildeten Kühlfachverdampfer verdampft, sondern bestimmungsgemäß zur Kälteerzeugung dem Gefrierfachverdampfer zugeführt ist, so daß ein Kälteverlust am Kühlfachverdampfer zumindest weitestgehend vermieden ist. By assigning the injection point to the board-like evaporator, the Injecting the liquid refrigerant copper pipeline into a roll bond or Z-Bond process produced refrigerant channel insertable and by chipless Deformation of the refrigerant channel, e.g. fixable by embossing liquid and gas tight, without using a machine to produce the injection point for the refrigerant having to provide complex and therefore costly welding processes. About that In addition, the purely mechanical seal offers by deforming the into the board molded refrigerant channel the advantage that the shape and position tolerances between the connection partners can be chosen larger than that between the Connection partner to be performed weld connection would be possible. Also unnecessary in contrast to a welded connection between the connection partners Constant leak test at the connection point, since the mechanical connection and Sealing the two connection partners from each other with very high process reliability is afflicted. Due to the thermal decoupling of the one provided with the injection point Section of the residual board area of the evaporator ensures that the injected liquid refrigerants are not already connected in series, Evaporated like a refrigerator compartment evaporated, but as intended is supplied to the freezer evaporator for cooling, so that a loss of cold on Refrigerator compartment evaporator is at least largely avoided.

Nach einer bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß der Abschnitt einen an die Einspritzstelle anschließenden Kältemittelkanal aufweist, welcher ausgangsseitig einen Anschlußbereich für die Rohrleitung aufweist.According to a preferred embodiment of the subject matter of the invention, that the section has a refrigerant channel adjoining the injection point, which has a connection area for the pipeline on the output side.

Hierdurch ergibt sich nicht nur eine besonders sichere, sondern auch eine besonders lagegenaue Anwendung der zur Führung von Kältemittel dienenden Rohrleitung des Gefrierfachverdampfers, wobei die Verbindungsstelle zwischen dem Kältemittelkanal und der Rohrleitung problemlos schweißtechnisch bewerkstelligbar ist, da sowohl die Rohrleitung als auch der Abschnitt mit dem Kältemittelkanal aus gleichem Werkstoff wie z.B. Aluminium gefertigt sein kann.This not only results in a particularly secure, but also a particularly precise position Application of the pipeline of the freezer evaporator used to guide refrigerant, the connection point between the refrigerant channel and the Pipe can be easily welded, since both the pipe as well as the section with the refrigerant channel made of the same material, e.g. aluminum can be made.

Eine besonders rasche und zielgerichtete Zuführung des eingespritzten Kältemittels in die Rohrleitung des Verdampfers höherer Kälteleistung ergibt sich, wenn nach einer nächsten bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß der Kältemittelkanal auf dem Abschnitt längenminimiert ausgebildet ist. Ferner sind unnötige Kälteverluste am Verdampfer geringerer Kälteleistung vermieden.A particularly quick and targeted supply of the injected refrigerant into the Pipe of the evaporator higher cooling capacity results if after a next one preferred embodiment of the object of the invention is provided that the Refrigerant channel is formed on the section minimized in length. Furthermore, are unnecessary Cold losses at the evaporator with lower cooling capacity avoided.

Entsprechend einer nächsten vorteilhaften Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß der Abschnitt mit der Restplatinenfläche des Verdampfers durch wenigsten einen stegartigen Verbindungsabschnitt verbunden ist, über welchen das abflußseitige Ende der Kältemittelkanalanordnung auf der Restplatinenfläche zumindest in den Nahbereich der Einspritzstelle geführt ist.According to a next advantageous embodiment of the subject of the invention it is provided that the section with the residual board area of the evaporator is connected by at least one web-like connecting section, via which the drain-side end of the refrigerant channel arrangement on the remaining board surface at least is led into the vicinity of the injection point.

Hierdurch ist nicht nur eine genaue Lagezuordnung des die Einspritzstelle tragenden Abschnitts zur Restplatinenfläche des Verdampfers hergestellt, sondern zugleich die Wärmeleitung von der Restplatinenfläche des Verdampfers zum Abschnitt hin minimiert. Darüber hinaus ist durch die Zuführung des abflußseitigen Endes der Kältemittelkanalanordnung auf der Restplatinenfläche eine kostengünstige und prinzipbedingt dichte Anbindung dieser Kältemittelkanalanordnung an das Saugrohr des Kältekreislaufes sichergestellt.As a result, it is not only an exact position assignment of the section carrying the injection point to the remaining board surface of the evaporator, but also the heat conduction minimized from the residual board area of the evaporator to the section. In addition, the supply of the drain-side end of the refrigerant channel arrangement an inexpensive and inherently tight connection on the remaining board area this refrigerant channel arrangement to the suction pipe of the refrigeration circuit ensured.

Besonders einfach herzustellen ist der Abschnitt und die Restplatinenfläche des Verdampfers geringerer Kälteleistung, wenn nach einer nächsten vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß der stegartige Verbindungsabschnitt einstückig mit dem Abschnitt und einstückig mit der Restplatinenfläche des Verdampfers verbunden ist. Außerdem ergibt sich durch die einstückige Anbindung des Abschnittes an die Restplatinenfläche des Verdampfers eine besonders exakte Lagezuordnung des ersteren zur letzteren. Darüber hinaus läßt sich der platinenartige Verdampfer geringerer Kälteleistung und der Abschnitt einstückig durch Ausschneiden aus einer Aluminium-Blechplatine herstellen.The section and the remaining board area of the evaporator are particularly easy to manufacture lower cooling capacity if according to a next advantageous embodiment the subject of the invention is provided that the web-like connecting portion in one piece with the section and in one piece with the remaining board surface of the evaporator connected is. The one-piece connection of the section also results a particularly exact location assignment to the remaining board surface of the evaporator the former to the latter. In addition, the board-like evaporator lower cooling capacity and the section in one piece by cutting from a Manufacture aluminum sheet metal.

Entsprechend einer nächsten bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß die Restplatinenfläche des Verdampfers innerhalb der Wärmeisolation eines Kältegerätes angeordnet und wärmeleitend an einer Innenverkleidung eines im Kältegerät vorgesehenen Kälteraums angekoppelt ist, während der Abschnitt außerhalb der Wärmeisolation liegt.According to a next preferred embodiment of the subject of the invention it is envisaged that the residual board area of the evaporator within the thermal insulation a refrigeration device arranged and thermally conductive on an inner panel a cold room provided in the refrigerator is coupled during the section lies outside the thermal insulation.

Durch eine derartige Anordnung des Verdampfers geringerer Kälteleistung, dessen mit der Einspritzstelle versehener Abschnitt außerhalb der Wärmeisolation liegt, ist eine deutliche Reduzierung des mit dem Einspritzen des flüssigen Kältemittels an der Einspritzstelle erzeugten Geräusches erreicht.By such an arrangement of the evaporator lower cooling capacity, the the section provided outside the thermal insulation is a clear one Reduction in the amount of liquid refrigerant injected at the injection point generated noise reached.

Besonders einfach sind unterschiedliche Kältemittelkanalquerschnitte und Kältemittelkanalverläufe für einen Verdampfer erzeugbar, wenn nach einer weiteren vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß der platinenartige Verdampfer nach dem Roll- oder Z-Bondverfahren hergestellt ist.Different refrigerant channel cross sections and refrigerant channel profiles are particularly simple can be generated for an evaporator if according to a further advantageous embodiment the subject of the invention is provided that the board-like evaporator is manufactured using the roll or Z-bond process.

Gemäß einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß der Verdampfer höherer Kälteleistung als kastenähnlich geformter Verdampfer mit einer zu einem Rohr geformten Trägerplatine und der daran in wärmeleitendem Kontakt aufgewickelten Rohrleitung ausgebildet ist.According to a further preferred embodiment of the subject of the invention It is provided that the evaporator has a higher cooling capacity than a box-like one Evaporator with a carrier plate formed into a tube and the heat-conducting on it Contact coiled pipe is formed.

Hierdurch ist eine besonders kostengünstige Variante für einen Gefrierfachverdampfer bereitgestellt.This is a particularly cost-effective variant for a freezer compartment evaporator provided.

Besonders sicher gas- und flüssigkeitsdicht ankoppelbar ist die Rohrleitung an die Kältemittelkanalanordnung des platinenartigen Verdampfers, wenn nach einer letzten bevorzugten Ausführungsform des Gegenstandes der Erfindung vorgesehen ist, daß die Rohrleitung abflußseitig über eine Anschlußstelle an der Verdampferplatine mit der Kältemittelkanalanordnung der Restplatinenfläche des Verdampfers verbunden ist. The pipeline can be coupled to the refrigerant channel arrangement particularly securely in a gas-tight and liquid-tight manner of the board-like evaporator, if after a last preferred Embodiment of the subject of the invention is provided that the pipeline discharge side via a connection point on the evaporator board with the refrigerant channel arrangement the remaining board surface of the evaporator is connected.

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

Fig. 1
eine Verdampferanordnung, gebildet aus einem Gefrierfachverdampfer und einem in Reihenschaltung nachgeordneten Kühlfachverdampfer mit einer an einem wärmetechnisch zumindest weitestgehend entkoppelten Verdampferabschnitt angeordneten Einspritzstelle, in raumbildlicher Ansicht von hinten und
Fig. 2
die Verdampferanordnung in Ansicht von hinten.
The invention is explained in the following description with reference to an embodiment shown in simplified form in the drawing. Show it:
Fig. 1
an evaporator arrangement, formed from a freezer compartment evaporator and a cooling compartment evaporator arranged in series with an injection point arranged on an at least largely thermally decoupled evaporator section, in a spatial view from behind and
Fig. 2
the evaporator arrangement in rear view.

Figur 1 zeigt in vereinfachter, schematischer Darstellung eine Verdampferanordnung 10 mit einem Gefrierfachverdampfer 11, welcher ein, beispielsweise aus einem Aluminiumblech geformtes Trägerrohr 12 aufweist, auf dessen der Wärmeisolation eines Kältegerätes zugewandter Mantelfläche 13 eine zur Führung von Kältemittel dienende Rohrleitung 14 aufgebracht ist, welche an ihren beiden Enden mit je einem Anschlußstück 15 bzw. 16 versehen ist und welche aus einem Aluminiumrohr besteht, welches in wärmeleitendem Kontakt an der Mantelfläche 13 festgesetzt ist. Zur Vergrößerung der wärmeübertragenden Oberfläche der Rohrleitung 13 auf die Mantelfläche 14 ist erstere an seiner freien Oberfläche mit einem aluminiumkaschierten Klebeband versehen, welches an der Mantelfläche 13 des Trägerrohres 12 festgesetzt ist. Das Trägerrohr 12 ist an seiner Rückseite mit einer aus Aluminiumblech gefertigten Rückwand 18 ausgestattet, welches zusammen mit dem Trägerrohr 12 und der darauf aufgewickelten Rohrleitung 14 den als sogenannten Kastenverdampfer bezeichneten Gefrierfachverdampfer 11 bildet. Diesem ist in Reihenschaltung ein rein schematisch dargestellter, beispielsweise im Rollbondverfahren hergestellter Kühlfachverdampfer 19 nachgeordnet, dessen durch Verschweißen zweier Aluminiumblechplatinen erzeugter platinenartiger Aufbau einen ersten Platinenabschnitt 20 aufweist, welcher als sogenannter Coldwall-Verdampfer ausgebildet ist und eine mäanderartig angelegte Kältemittelkanalanordnung 21 aufweist, welche an ihrem zuflußseitigen Ende in eine an den Platinenabschnitt 20 mitangeformte Anschlußstelle 22 mündet und welche an ihrem abflußseitigen Ende einen Kanalabschnitt 23 aufweist. Dieser ist über einen von zwei zueinander beabstandeten, einen zur wärmetechnischen Entkopplung dienenden Zwischenraum zwischen sich aufnehmenden stegartigen Verbindungsabschnitten 25 geführt. Die stegartigen Verbindungsabschnitte 25 sind sowohl einstückig mit dem Platinenabschnitt 20 als auch einstückig mit einem zweiten, zum Kühlfachverdampfer 19 gehörenden Platinenabschnitt 26 verbunden, welcher hinsichtlich seiner Oberfläche deutlich geringer als die Oberfläche des Platinenabschnitts 20 bemessen und welcher im wesentlichen rechteckförmig ausgebildet ist, wobei an einer seiner längeren Rechteckseiten die Verbindungsabschnitte 25 angebunden sind. Der Platinenabschnitt 26 ist mit einem parallel zu seiner längeren Rechteckseiten verlaufenden Kältemittelkanal 27 ausgestattet, welcher über die gesamte Länge des Platinenabschnitts 26 verläuft und welcher an seinem zuflußseitigen Ende eine an den Platinenabschnitt 26 einstückig mitangeformte Anschlußstelle 28 und an seinem abflußseitigen Ende ebenfalls an den Platinenabschnitt 26 mitangeformte Anschlußstelle 29 zur Einbringung weiter unten genauer erläuterter Rohrleitungen versehen ist. Der Kältemittelkanal 27 dient an seinem der Anschlußstelle 28 zugewandten zuflußseitigen Abschnitt zur Aufnahme einer beispielsweise aus Kupfer gefertigten Drosselrohrleitung 30, welche mit einem ihrer Enden anhand einer partiellen, plastischen Verformung unter Bildung einer sogenannten Prägestelle 31 im Kältemittelkanal 27 gas- und flüssigkeitsdicht festgesetzt ist, wobei das freie Ende des Drosselrohres 30 als Einspritzstelle 32 für das flüssige Kältemittel dient. Zwischen der Einspritzstelle 32 und der Anschlußstelle 28, an welcher ein die Drosselleitung in sich aufnehmendes, beispielsweise aus Aluminium hergestelltes Saugrohr 33 schweißtechnisch festgesetzt ist, ist eine Anbindungsstelle 34 für den über den Verbindungsabschnitt 25 geführten Kanalabschnitt 23 an den Kältemittelkanal 27 vorgesehen. Der Kältemittelkanal 27 mündet ausflußseitig in der Anschlußstelle 29, in welcher ein beispielsweise aus Aluminium gefertigtes Verbindungsrohr 35 schweißtechnisch festgesetzt ist, welches zur Verbindung des Kältemittelkanals 27 mit der Rohrleitung 14 mit dessen zuflußseitig vorgesehenen Anschlußstück 15 verschweißt ist. Das abflußseitig an der Rohrleitung 14 vorgesehene Anschlußstück 16 dient zur Aufnahme eines ebenfalls aus Aluminium hergestellten Zwischenrohres 36, welches einerseits mit dem Anschlußstück 16 und andererseits mit der Anschlußstelle 22 am Platinenabschnitt 20 verschweißt ist.FIG. 1 shows an evaporator arrangement 10 in a simplified, schematic representation with a freezer evaporator 11, which, for example, from an aluminum sheet has shaped support tube 12, on the heat insulation of a refrigerator facing jacket surface 13 is a pipe used to guide refrigerant 14 is applied, which at both ends with a connector 15 and 16 respectively is provided and which consists of an aluminum tube, which in heat-conducting Contact is set on the outer surface 13. To increase the heat transfer Surface of the pipe 13 on the lateral surface 14 is the former at its free Provide the surface with an aluminum-coated adhesive tape, which is on the outer surface 13 of the support tube 12 is fixed. The carrier tube 12 is on its back equipped with a rear wall 18 made of aluminum sheet, which together with the support tube 12 and the pipe 14 wound thereon as so-called box evaporator designated freezer evaporator 11 forms. this is a purely schematically shown in series connection, for example in the roll bond process manufactured cooling compartment evaporator 19, the latter by welding two aluminum sheet blanks produced board-like structure a first board section 20, which is designed as a so-called cold wall evaporator and one has meandering refrigerant channel arrangement 21, which on its inflow side End in a connection point 22 which is also molded onto the circuit board section 20 opens and which has a channel section 23 at its drain-side end. This is one of two spaced apart, one for thermal Decoupling serving space between receiving web-like connecting sections 25 out. The web-like connecting sections 25 are both in one piece with the circuit board section 20 as well as in one piece with a second, to the refrigerator compartment evaporator 19 associated board section 26, which with respect dimensioned its surface significantly smaller than the surface of the circuit board section 20 and which is substantially rectangular, with one of its longer rectangular sides the connecting sections 25 are connected. The board section 26 has a refrigerant channel running parallel to its longer rectangular sides 27 equipped, which over the entire length of the board section 26 runs and which one at its inflow-side end to the plate section 26 integrally molded joint 28 and also at its drain end to the board section 26 molded joint 29 for insertion below more detailed piping is provided. The refrigerant channel 27 is used on his the connection point 28 facing the inflow section for receiving a for example, made of copper throttle pipe 30, which has one of its ends based on a partial, plastic deformation to form a so-called Embossing point 31 is fixed gas and liquid-tight in the refrigerant channel 27, the free end of the throttle tube 30 serves as an injection point 32 for the liquid refrigerant. Between the injection point 32 and the connection point 28, at which the throttle line self-contained intake manifold 33 made of aluminum, for example is fixed in terms of welding technology, there is a connection point 34 for the connection section 25 guided channel section 23 is provided on the refrigerant channel 27. The refrigerant channel 27 opens on the outlet side into the connection point 29, in which for example made of aluminum connecting tube 35 fixed by welding which is used to connect the refrigerant channel 27 to the pipeline 14 whose connector 15 provided on the inflow side is welded. That on the drain side the pipe 14 provided connector 16 also serves to receive a intermediate tube 36 made of aluminum, which on the one hand with the connector 16 and on the other hand welded to the connection point 22 on the circuit board section 20 is.

Bei Betrieb der Verdampferanordnung wird das von einem nicht gezeigten Kältemittelverdichter zwangsweise umgewälzte Kältemittel im flüssigen Zustand über das Drosselrohr 30 der Einspritzstelle 32 zugeführt, welche kältetechnisch eigentlich dem Gefrierfachverdampfer 11 zuzuordnen wäre und welche diesem ohne merkliche Kälteeinbuße über eine kurze Kältemittelfließstrecke, gebildet aus dem Kältemittelkanal 27 und dem Verbindungsrohr 34, vorgelagert ist. Von der Einspritzstelle 32 aus strömt das Kältemittel, symbolisch angedeutet durch die Pfeile, über den Kältemittelkanal 27, dem Verbindungsrohr 34 in die Rohrleitung 14 des Gefrierfachverdampfers, wo es an deren ausgangsseitigen Ende über das Zwischenrohr 36 in den nachgeschalteten Kühlfachverdampfer 19. During operation of the evaporator arrangement, this is done by a refrigerant compressor, not shown forced refrigerant in the liquid state via the throttle tube 30 fed to the injection point 32, which actually refrigeration technically the freezer evaporator 11 would be assigned and which this without noticeable loss of cold over a short refrigerant flow path, formed from the refrigerant channel 27 and the Connection tube 34, is upstream. The refrigerant flows from the injection point 32, symbolically indicated by the arrows, via the refrigerant channel 27, the connecting pipe 34 in the pipeline 14 of the freezer evaporator, where it is on the outlet side End via the intermediate pipe 36 into the downstream cooling compartment evaporator 19.

Dort durchströmt es dessen Kältemittelkanalanordnung 21 bevor das Kältemittel über den Kanalabschnitt 23 am Verbindungsabschnitt 25 in das Saugrohr 33 übertritt.There it flows through its refrigerant channel arrangement 21 before the refrigerant flows through the Channel section 23 at the connecting section 25 passes into the suction pipe 33.

Anstelle des kastenähnlich ausgebildeten Gefrierfachverdampfers 30 ist es auch vorstellbar, daß dieser als sogenannter Drahtrohrverdampfer mit in unterschiedlichen Höhenlagen angeordneten Verdampferetageren ausgebildet ist.Instead of the box-like freezer evaporator 30, it is also conceivable that this as a so-called wire tube evaporator with at different altitudes arranged evaporator shelves is formed.

Claims (9)

  1. Evaporator arrangement (10) with at least two evaporators (11, 19), which are arranged one behind the other in series connection and are acted on with refrigerant from a compressor by way of an injection point (32), of different refrigerating output, wherein the evaporator (19) of lower refrigerating output is constructed to be plate-shaped, whilst the evaporator (11) of higher refrigerating output is equipped with a pipe duct (14), which serves for conducting the refrigerant, and is connected in the series to be upstream of the evaporator with lower refrigerating output, characterised in that the plate-shaped evaporator (19) of lower refrigerating output has a section (26) which is equipped with the injection point (32) for the refrigerant and which is at least substantially decoupled thermally from the rest of the plate area (20) of the evaporator (19).
  2. Evaporator arrangement according to claim 1, characterised in that the section (26) has a refrigerant channel (27) which is connected with the injection point (32) and which has at the outlet end a connecting region for the pipe duct.
  3. Evaporator arrangement according to claim 2, characterised in that the refrigerant channel (27) on the section (26) is formed to be minimised in length.
  4. Evaporator arrangement according to one of claims 1 to 3, characterised in that the section (26) is connected with the residual plate area (20) of the evaporator (19) by least one web-like connecting portion (25), by way of which the outflow end of the refrigerant channel arrangement (21) is led on the residual plate surface (20) at least into the vicinity of the injection point (32).
  5. Evaporator arrangement according to claim 4, characterised in that the web-like connecting portion (25) is integrally connected with the section (26) and integrally connected with the residual plate area (20) of the evaporator (19).
  6. Evaporator arrangement according to one of claims 1 to 5, characterised in that the residual plate area (20) of the evaporator (19) is arranged within the thermal insulation of a refrigerating appliance and is thermally conductively coupled to an inner lining of a refrigerating chamber provided in the refrigerating appliance, whereas the section (26) is disposed outside the thermal insulation.
  7. Evaporator arrangement according to one of claims 1 to 6, characterised in that the plate-shaped evaporator (19) is produced according to the roll-bond or Z-bond method.
  8. Evaporator arrangement according to claim 1, characterised in that the evaporator (11) of higher refrigerating output is constructed as an evaporator, which is formed similarly to a box, with a support plate formed into a pipe (12) and the pipe duct (14) wound on thereat in thermally conductive contact.
  9. Evaporator arrangement according to one of claims 1, 2 and 8, characterised in that the pipe duct (14) is connected at the outflow side by way of a connecting point (22) at the plate of the evaporator (19) with the refrigerant channel arrangement (21) of the residual plate area (20) of the evaporator (19).
EP98966381A 1997-12-22 1998-12-18 Evaporator system Expired - Lifetime EP1042638B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9830222T SI1042638T1 (en) 1997-12-22 1998-12-18 Evaporator system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29722661U 1997-12-22
DE29722661U DE29722661U1 (en) 1997-12-22 1997-12-22 Evaporator arrangement
PCT/EP1998/008359 WO1999032839A1 (en) 1997-12-22 1998-12-18 Evaporator system

Publications (2)

Publication Number Publication Date
EP1042638A1 EP1042638A1 (en) 2000-10-11
EP1042638B1 true EP1042638B1 (en) 2002-05-08

Family

ID=8050353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98966381A Expired - Lifetime EP1042638B1 (en) 1997-12-22 1998-12-18 Evaporator system

Country Status (9)

Country Link
EP (1) EP1042638B1 (en)
CN (1) CN1157583C (en)
BR (1) BR9814362A (en)
DE (2) DE29722661U1 (en)
ES (1) ES2177133T3 (en)
PL (1) PL190948B1 (en)
RU (1) RU2185577C2 (en)
TR (1) TR200001764T2 (en)
WO (1) WO1999032839A1 (en)

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Publication number Priority date Publication date Assignee Title
DE202005000909U1 (en) * 2004-12-28 2006-05-04 Liebherr-Hausgeräte Ochsenhausen GmbH Fridge and freezer

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JP4770474B2 (en) 2006-01-20 2011-09-14 株式会社デンソー Ejector type refrigeration cycle unit and method for manufacturing the same
KR100451221B1 (en) * 2001-11-16 2004-10-02 엘지전자 주식회사 Direct cooling type refrigerator using combustibility refrigerants
JP4548350B2 (en) 2006-01-20 2010-09-22 株式会社デンソー Ejector type refrigeration cycle unit
DE102008044253A1 (en) * 2008-12-02 2010-06-10 BSH Bosch und Siemens Hausgeräte GmbH Evaporator for a refrigeration device
WO2010078722A1 (en) * 2009-01-06 2010-07-15 Danfoss Qinbao (Hangzhou) Plate Heat Exchanger Company Limited Heat exchanger, heat pump system and air conditioning system
CN104034112B (en) * 2013-03-18 2016-12-28 海尔集团公司 Direct cooling refrigerator
CN106556183A (en) * 2015-09-27 2017-04-05 王秀红 Multiaspect evaporator tube board component
CN108662831A (en) * 2018-06-13 2018-10-16 威海安泰电子制冷设备有限公司 A kind of household low temperature refrigerator
CN109813010B (en) * 2019-01-14 2021-08-10 合肥美的电冰箱有限公司 Evaporator and refrigerator

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DE2909704C2 (en) * 1979-03-12 1985-05-23 R. & G. Schmöle Metallwerke GmbH & Co KG, 5750 Menden Evaporator in a refrigeration system
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IT213782Z2 (en) * 1988-05-04 1990-03-01 Eurodomestici Ind Riunite EVAPORATOR FOR STATIC REFRIGERATORS.
DE29516202U1 (en) * 1995-08-16 1996-12-19 Liebherr Hausgeraete Refrigerator with a normal cold room and a freezer room

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005000909U1 (en) * 2004-12-28 2006-05-04 Liebherr-Hausgeräte Ochsenhausen GmbH Fridge and freezer

Also Published As

Publication number Publication date
TR200001764T2 (en) 2001-11-21
WO1999032839A1 (en) 1999-07-01
PL190948B1 (en) 2006-02-28
DE59804098D1 (en) 2002-06-13
BR9814362A (en) 2000-10-17
CN1157583C (en) 2004-07-14
RU2185577C2 (en) 2002-07-20
CN1283261A (en) 2001-02-07
ES2177133T3 (en) 2002-12-01
EP1042638A1 (en) 2000-10-11
PL341234A1 (en) 2001-03-26
DE29722661U1 (en) 1998-05-07

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