EP0732553B1 - Evaporator arrangement especially for compressor driven domestic refrigerators - Google Patents

Evaporator arrangement especially for compressor driven domestic refrigerators Download PDF

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Publication number
EP0732553B1
EP0732553B1 EP96101060A EP96101060A EP0732553B1 EP 0732553 B1 EP0732553 B1 EP 0732553B1 EP 96101060 A EP96101060 A EP 96101060A EP 96101060 A EP96101060 A EP 96101060A EP 0732553 B1 EP0732553 B1 EP 0732553B1
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EP
European Patent Office
Prior art keywords
evaporator
coldness
refrigerant
output
sections
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EP96101060A
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German (de)
French (fr)
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EP0732553A2 (en
EP0732553A3 (en
Inventor
Friedrich Dipl.-Ing. Arnold
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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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
    • F25B39/022—Evaporators with plate-like or laminated elements
    • F25B39/024—Evaporators with plate-like or laminated elements with elements constructed in the shape of a hollow panel

Definitions

  • the invention relates to an evaporator arrangement, in particular for compressor operated household refrigeration appliances, with at least two fluidically connected in series connected, having a different cooling capacity, circuit board-like evaporator sections, their refrigerant channel arrangement controlled by tax organs with from one Refrigerant compressor pumped refrigerant can be acted upon which is above the respective evaporator sections assigned injection points to the evaporator sections and via a common to the evaporator sections Suction line is discharged.
  • Evaporator arrangements with evaporator sections connected in series different cooling capacities are known for example from DE 32 24 452 A1.
  • Multi-temperature cooling devices are known, their thermal Cold compartments separated from one another using an evaporator arrangement with a corresponding number of evaporator sections different cooling capacity within your dedicated temperature range are maintained.
  • the evaporator sections are in such multi-temperature refrigeration devices by control elements designed as solenoid valves individually charged with refrigerant and for this purpose provided with an injection point, the evaporator sections lower cooling capacity, e.g. Fresh cooler and normal refrigerator compartment the evaporator section of higher cooling capacity, such as a freezer in series are upstream to the evaporator section higher To flow through refrigeration capacity constantly with refrigerant.
  • the invention has for its object an evaporator arrangement propose which with simple constructive Measures avoided the disadvantages of the prior art are.
  • the evaporator section of higher cooling capacity in the inflow side Area of its refrigerant channel arrangement at least has an approximately vertically arranged section, which with a for fluidic connection of the Connection point serving evaporator sections is equipped, which is arranged in a monotonously falling Section of the refrigerant channel arrangement of the Evaporator section higher cooling capacity is provided.
  • the solution according to the invention ensures that the evaporator section has higher cooling capacity even when operating the evaporator sections with lower cooling capacity charged with liquid refrigerant and thus is always chilled.
  • the evaporator arrangement is also related insensitive to a certain inclination of the refrigerator.
  • the invention provides that three evaporator sections are provided, one of which has a higher cooling capacity than the other two and each of the others Evaporator sections in refrigeration in series connection is connected downstream, both evaporator sections smaller Cooling capacity through a single connection point with the evaporator section with higher refrigeration capacity are connected.
  • connection of the is particularly simple and yet secure two evaporator sections with lower cooling capacity at the Evaporator section higher cooling capacity, if after a next advantageous embodiment of the subject of Invention is provided that the junction counter a refrigerant channel piece in the direction of flow of the refrigerant is upstream in which the refrigerant flow from each refrigerant channel arrangement of the evaporator sections lower cooling capacity merged and into the connection point is initiated.
  • the object of the invention is that the evaporator section higher cooling capacity than C-shaped, a floor, a ceiling and a rear wall section Freezer compartment evaporator is executed, in which the connection point within the rear wall section is arranged.
  • the invention provides that the evaporator section higher cooling capacity and the evaporator sections lower cooling capacity within a one-piece evaporator board are arranged and that each of the evaporator sections inside the one-piece evaporator board with an injection point provided on its heat exchange surface is provided.
  • the only figure shows a board-like evaporator in stretched representation with three within the board area arranged evaporator sections.
  • certain evaporator arrangement 10 is through Pressure welding of two one-piece, immediate stacked aluminum sheet boards produced and with evaporator sections with different cooling capacities fitted. Of these, the lowest is the cooling capacity having evaporator section as a refrigerator compartment evaporator 11 executed, which on its free longer Rectangular side is provided with a connection point 12 in which is an unillustrated one serving as an injection pipe Throttle tube can be inserted. At junction 12 is followed by a refrigerant channel arrangement 13, the outlet end is designed as a double channel and along one piece connected to the refrigerator compartment evaporator 11 Connecting web 14 runs.
  • the freezer compartment evaporator 15 points to the refrigerator compartment evaporator 11 Section side on a junction 16, which like that of the refrigerator compartment evaporator 11 for insertion for as Injection tube used, not shown Throttle tube is used, which means in the connection point a solder joint is set pressure-tight.
  • the junction 16 is one in turns over the heat exchange_ Area of the zero-degree compartment evaporator-running refrigerant channel arrangement 17 connected, the outlet end branches into a double channel 18, which runs along a integrally connected to the zero degree compartment evaporator 15 Connecting web 19 runs.
  • This evaporator section is designed as a freezer compartment evaporator 20 and in its ready-to-install shape [-shaped.
  • the Freezer compartment evaporator 20 has a bottom section 21, one Rear wall section 22 and a ceiling section 23, which serve as heat exchange surfaces, being in the ceiling section 23 an injection point 24 is provided, which generated by embossing a throttle tube, not shown is.
  • the injection point 24 is fluidly connected one over most of its length refrigerant channel laid in turns, which is located in one train continuously across the three areas of the freezer evaporator 20 extends and which its refrigerant channel arrangement 25 forms. This is in the range of yours Refrigerant inflow via the injection point 24, in the installed position the evaporator arrangement 10 arranged vertically Rear wall area 22 with an inflow opening Provide connection point 26.
  • the junction 26 is opposite to the direction of refrigerant flow generated by the compressor upstream of a refrigerant channel piece 27, which for fluidic connection of the refrigerant channel arrangements 13 or 17 of the refrigerator compartment evaporator 11 or Zero degree compartment evaporator 15 to the refrigerant channel arrangement 25 is used so that one of these refrigerant channel arrangements 13 or 17 in series connection in front of the refrigerant channel arrangement 25 lies.
  • the refrigerant channel arrangements 13 and 17 are each for the purpose of connecting them unique refrigerant channel, which in turn to the provided on the respective connecting web 14 or 19 Double duct connects to the refrigerant duct piece 27.
  • [-shaped freezer compartment evaporator 20 can be such as the refrigerator compartment evaporator 11 and Zero degree compartment evaporator 15, only as a flat board surface be trained.

Description

Die Erfindung betrifft eine Verdampferanordnung, insbesondere für verdichterbetriebene Haushalts-Kältegeräte, mit wenigstens zwei strömungstechnisch in Reihenschaltung miteinander verbundenen, eine unterschiedliche Kälteleistung aufweisenden, platinenartigen Verdampferabschnitten, deren Kältemittelkanalanordnung durch Steuerorgane gesteuert mit von einem Kältemittelverdichter geförderten Kältemittel beaufschlagbar ist, welches über den jeweiligen Verdampferabschnitten zugeordnete Einspritzstellen den Verdampferabschnitten zugeführt und über eine den Verdampferabschnitten gemeinsame Saugleitung abgeführt ist.The invention relates to an evaporator arrangement, in particular for compressor operated household refrigeration appliances, with at least two fluidically connected in series connected, having a different cooling capacity, circuit board-like evaporator sections, their refrigerant channel arrangement controlled by tax organs with from one Refrigerant compressor pumped refrigerant can be acted upon which is above the respective evaporator sections assigned injection points to the evaporator sections and via a common to the evaporator sections Suction line is discharged.

Verdampferanordnungen mit in Reihe geschalteten Verdampferabschnitten unterschiedlicher Kälteleistung sind beispielsweise aus der DE 32 24 452 A1 bekannt.Evaporator arrangements with evaporator sections connected in series different cooling capacities are known for example from DE 32 24 452 A1.

Es sind Mehrtemperaturen-Kühlgeräte bekannt, deren thermisch voneinander getrennten Kältefächer anhand einer Verdampferanordnung mit einer entsprechenden Anzahl von Verdampferabschnitten unterschiedlicher Kälteleistung innerhalb ihres zweckbestimmten Temperaturbereiches gehalten sind. Die Verdampferabschnitte sind bei derartigen Mehrtemperaturen-Kältegeräten durch als Magnetventile ausgebildete Steuerorgane einzeln mit Kältemittel beaufschlagbar und zu diesem Zweck mit einer Einspritzstelle versehen, wobei die Verdampferabschnitte geringerer Kälteleistung, wie z.B. Frischkühlfach und Normalkühlfach dem Verdampferabschnitt höherer Kälteleistung, wie beispielsweise einem Gefrierfach in Reihenschaltung vorgeschaltet sind, um den Verdampferabschnitt höherer Kälteleistung ständig mit Kältemittel zu durchströmen. Bei einer derartigen Verdampferanordnung besteht jedoch die Gefahr, daß während der Abtauphase eines der Verdampferabschnitte geringerer Kälteleistung flüssiges Kältemittel von der Verbindungsstelle mit dem Verdampferabschnitt höherer Kälteleistung in dessen Kältemittelkanalanordnung eintritt und an der Eintrittsstelle aufgrund der betriebsbedingt in diesem Verdampferabschnitt herrschenden höheren Temperatur verdampft. Dies führt dazu, daß trotz der ständig wiederkehrenden Abtauzyklen sich im Eintrittsbereich des Verdampferabschnitts geringerer Kälteleistung ein stetig anwachsender Eisansatz bildet, welcher letztendlich zu Funktionsstörungen des Gerätes führt.Multi-temperature cooling devices are known, their thermal Cold compartments separated from one another using an evaporator arrangement with a corresponding number of evaporator sections different cooling capacity within your dedicated temperature range are maintained. The evaporator sections are in such multi-temperature refrigeration devices by control elements designed as solenoid valves individually charged with refrigerant and for this purpose provided with an injection point, the evaporator sections lower cooling capacity, e.g. Fresh cooler and normal refrigerator compartment the evaporator section of higher cooling capacity, such as a freezer in series are upstream to the evaporator section higher To flow through refrigeration capacity constantly with refrigerant. At However, there is a risk of such an evaporator arrangement that during the defrost phase one of the evaporator sections lower cooling capacity liquid refrigerant from the junction with the higher evaporator section Cooling capacity occurs in its refrigerant channel arrangement and at the entry point due to operational reasons in this evaporator section prevailing higher temperature evaporates. This leads to the fact that despite the constantly recurring Defrost cycles occur in the entrance area of the evaporator section lower cooling capacity a steadily increasing Ice formation forms, which ultimately leads to malfunctions of the device.

Der Erfindung liegt die Aufgabe zugrunde, eine Verdampferanordnung vorzuschlagen, bei welcher mit einfachen konstruktiven Maßnahmen die Nachteile des Standes der Technik vermieden sind.The invention has for its object an evaporator arrangement propose which with simple constructive Measures avoided the disadvantages of the prior art are.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß der Verdampferabschnitt höherer Kälteleistung im zuflußseitigen Bereich seiner Kältemittelkanalanordnung wenigstens einen annähernd vertikal angeordneten Abschnitt aufweist, welcher mit einer zur strömungstechnischen Verschaltung der Verdampferabschnitte dienenden Verbindungsstelle ausgestattet ist, welche in einem monoton fallend angeordneten Abschnitt der Kältemittelkanalanordnung des Verdampferabschnitts höherer Kälteleistung vorgesehen ist. This object is achieved according to the invention in that the evaporator section of higher cooling capacity in the inflow side Area of its refrigerant channel arrangement at least has an approximately vertically arranged section, which with a for fluidic connection of the Connection point serving evaporator sections is equipped, which is arranged in a monotonously falling Section of the refrigerant channel arrangement of the Evaporator section higher cooling capacity is provided.

Durch die erfindungsgemäße Lösung ist einerseits sichergestellt, daß der Verdampferabschnitt höherer Kälteleistung auch bei Betrieb der Verdampferabschnitte geringerer Kälteleistung mit flüssigem Kältemittel beaufschlagt und somit stets mitgekühlt ist. Andererseits ist gleichzeitig, ohne technisch aufwendige Maßnahmen zur Verhinderung des Rückflusses von flüssigem Kältemittel in einen oder mehrere momentan inaktive Verdampferabschnitte treffen zu müssen, lediglich aufgrund der auf das flüssige Kältemittel einwirkenden Schwerkraft stets sichergestellt, daß keine Flüssigkeitsanteile in die inaktiven Verdampferabschnitte gelangen können. Außerdem ist die Verdampferanordnung auch bezüglich einer gewissen Schrägstellung des Kältegerätes unempfindlich.On the one hand, the solution according to the invention ensures that the evaporator section has higher cooling capacity even when operating the evaporator sections with lower cooling capacity charged with liquid refrigerant and thus is always chilled. On the other hand, without technically complex measures to prevent backflow of liquid refrigerant in one or more currently only have to hit inactive evaporator sections due to the effects on the liquid refrigerant Gravity always ensures that there are no liquid components get into the inactive evaporator sections can. In addition, the evaporator arrangement is also related insensitive to a certain inclination of the refrigerator.

Gemäß einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß drei Verdampferabschnitte vorgesehen sind, von denen einer eine höhere Kälteleistung als die beiden anderen aufweist und jedem der anderen Verdampferabschnitte kältetechnisch in Reihenschaltung nachgeschaltet ist, wobei beide Verdampferabschnitte geringerer Kälteleistung durch eine einzige Verbindungsstelle mit dem Verdampferabschnitt höherer Kälteleistung strömungstechnisch verschaltet sind.According to a further preferred embodiment of the object the invention provides that three evaporator sections are provided, one of which has a higher cooling capacity than the other two and each of the others Evaporator sections in refrigeration in series connection is connected downstream, both evaporator sections smaller Cooling capacity through a single connection point with the evaporator section with higher refrigeration capacity are connected.

Eine solche Lösung zeichnet sich vor allem durch die fertigungsfreundliche und somit kostengünstige Anbindung der Verdampferabschnitte geringerer Kälteleistung an den Verdampferabschnitt höherer Kälteleistung, aber auch durch ihren kühltechnisch und somit energetisch günstigen Wirkungsgrad aus.Such a solution is characterized above all by the production-friendly and thus inexpensive connection of the evaporator sections lower cooling capacity to the evaporator section higher cooling capacity, but also through their Cooling efficiency and thus energetically favorable efficiency out.

Besonders einfach und dennoch sicher ist die Anbindung der beiden Verdampferabschnitte geringerer Kälteleistung an den Verdampferabschnitt höherer Kälteleistung, wenn nach einer nächsten vorteilhaften Ausgestaltung des Gegenstandes der Erfindung vorgesehen ist, daß der Verbindungsstelle, entgegen der Strömungsrichtung des Kältemittels ein Kältemittelkanalstück vorgelagert ist, in welchem der Kältemittelstrom aus jeder Kältemittelkanalanordnung der Verdampferabschnitte geringerer Kälteleistung zusammengeführt und in die Verbindungsstelle eingeleitet ist.The connection of the is particularly simple and yet secure two evaporator sections with lower cooling capacity at the Evaporator section higher cooling capacity, if after a next advantageous embodiment of the subject of Invention is provided that the junction counter a refrigerant channel piece in the direction of flow of the refrigerant is upstream in which the refrigerant flow from each refrigerant channel arrangement of the evaporator sections lower cooling capacity merged and into the connection point is initiated.

Entsprechend einer weiteren bevorzugten Ausführungsform des Gegenstandes der Erfindung ist vorgesehen, daß der Verdampferabschnitt höherer Kälteleistung als C-förmig ausgebildeter, einen Boden-, einen Decken- und einen Rückwandabschnitt aufweisender Gefrierfachverdampfer ausgeführt ist, bei welchem die Verbindungsstelle innerhalb des Rückwandabschnittes angeordnet ist.According to a further preferred embodiment of the The object of the invention is that the evaporator section higher cooling capacity than C-shaped, a floor, a ceiling and a rear wall section Freezer compartment evaporator is executed, in which the connection point within the rear wall section is arranged.

Bei einem derartig ausgebildeten Verdampferabschnitt hat sich der Ort für die Anbringung der Verbindungsstelle als besonders günstig hinsichtlich der Verhinderung des Rückflusses von flüssigem Kältemittel in einen der nicht aktiven Verdampferabschnitte erwiesen.In such an evaporator section the place for the attachment of the connection point as particularly favorable in terms of preventing backflow from liquid refrigerant to one of the inactive ones Evaporator sections proved.

Nach einer letzten bevorzugten Ausführungsform des Gegenstandes der Erfindung Ist vorgsehen, daß der Verdampferabschnitt höherer Kälteleistung und die Verdampferabschnitte geringerer Kälteleistung innerhalb einer einstückigen Verdampferplatine angeordnet sind und daß jeder der Verdampferabschnitte innerhalb der einstückigen Verdampferplatine mit einer an seiner Wärmetauschfläche vorgesehenen Einspritzstelle versehen ist. According to a last preferred embodiment of the object The invention provides that the evaporator section higher cooling capacity and the evaporator sections lower cooling capacity within a one-piece evaporator board are arranged and that each of the evaporator sections inside the one-piece evaporator board with an injection point provided on its heat exchange surface is provided.

Durch eine solche Lösung ist einerseits eine innerhalb des Fertigungsprozesses besonders einfach zu handhabende Verdampferanordnung geschaffen, bei welcher zudem noch eine besonders exakte Temperaturführung aufgrund der jedem Verdampferabschnitt separat zugeordneten Einspritzstelle für das flüssige Kältemittel möglich ist.With such a solution, one is within the Manufacturing process particularly easy to use evaporator arrangement created, which also has a special exact temperature control due to each evaporator section separately assigned injection point for the liquid refrigerant is possible.

Die Erfindung ist in der nachfolgenden Beschreibung anhand eines in der beigefügten Zeichnung vereinfacht dargestellten Ausführungsbeispieles erläutert.The invention is described in the following description one shown in simplified form in the accompanying drawing Embodiment explained.

Die einzige Figur zeigt einen platinenartigen Verdampfer in gestreckter Darstellung mit drei innerhalb der Platinenfläche angeordneten Verdampferabschnitten.The only figure shows a board-like evaporator in stretched representation with three within the board area arranged evaporator sections.

Eine zum Einsatz in einem nicht dargestellten Dreitemperaturen-Kältegerät bestimmte Verdampferanordnung 10 ist durch Preßschweißen von zwei einstückig ausgebildeten, unmittelbar übereinander angeordneten Aluminiumblech-Platinen erzeugt und mit Verdampferabschnitten unterschiedlicher Kälteleistung ausgestattet. Von diesen ist der die geringste Kälteleistung aufweisende Verdampferabschnitt als Kühlfachverdampfer 11 ausgeführt, welcher an seiner freien längeren Rechteckseite mit einer Anschlußstelle 12 versehen ist, in welche ein nicht dargestelltes, als Einspritzrohr dienendes Drosselrohr einbringbar ist. An die Anschlußstelle 12 schließt sich eine Kältemittelkanalanordnung 13 an, deren auslaufseitiges Ende als Doppelkanal ausgebildet ist und entlang eines einstückig mit dem Kühlfachverdampfer 11 verbundenen Verbindungssteges 14 verläuft. Dieser ist zu seiner mechanischen Fixierung über nicht näher dargestellte Haltestege an einem als Nullgrad-Fach-Verdampfer 15 ausgebildeten Verdampferabschnitt angekoppelt. Der Nullgrad-Fach-Verdampfer 15 weist auf seiner dem Kühlfach-Verdampfer 11 zugewandten Abschnittsseite eine Anschlußstelle 16 auf, welche wie die des Kühlfach-Verdampfers 11 zum Einbringen für ein als Einspritzrohr zum Einsatz kommenden, nicht dargestellten Drosselrohres dient, welches in der Anschlußstelle mittels einer Lötverbindung druckdicht festgesetzt ist. Mit der Anschlußstelle 16 ist eine in Windungen über die Wärmetausch_ fläche des Null-Grad-Fach-Verdampfers verlaufende Kältemittelkanalanordnung 17 verbunden, deren auslaufseitiges Ende sich in einen Doppelkanal 18 auf zweigt, welcher entlang eines einstückig mit dem Null-Grad-Fach-Verdampfer 15 verbundenen Verbindungssteges 19 verläuft. Dieser ist wie der Verbindungssteg 14 einstückig mit einem benachbart zu dem als Null-Grad-Fach-Verdampfer 15 dienenden Verdampferabschnitt angeordneten Verdampferabschnitt verbunden, welcher die höchste Kälteleistung aufweist. Dieser Verdampferabschnitt ist als Gefrierfachverdampfer 20 ausgeführt und in seiner einbaufertigen Formgebung [-förmig ausgebildet. Der Gefrierfachverdampfer 20 weist einen Bodenabschnitt 21, einen Rückwandabschnitt 22 und einen Deckenabschnitt 23 auf, welche als Wärmetauschflächen dienen, wobei im Deckenabschnitt 23 eine Einspritzstelle 24 vorgesehen ist, welche durch Festprägen eines nicht dargestellten Drosselrohres erzeugt ist. An die Einspritzstelle 24 schließt sich strömungstechnisch ein über den überwiegenden Teil seiner Länge in Windungen verlegter Kältemittelkanal an, welcher sich in einem Zug durchgängig über die drei Bereiche des Gefrierfachverdampfers 20 hinweg erstreckt und welcher dessen Kältemittelkanalanordnung 25 bildet. Diese ist im Bereich ihres Kältemittelzuflusses über die Einspritzstelle 24, im in Einbaulage der Verdampferanordnung 10 vertikal angeordneten Rückwandbereich 22 mit einer als Zuströmöffnung ausgebildeten Verbindungsstelle 26 versehen. Der Verbindungsstelle 26 ist entgegen der vom Verdichter erzeugten Kältemittelflußrichtung ein Kältemittelkanalstück 27 vorgeschaltet, welches zur strömungstechnischen Anbindung der Kältemittelkanalanordnungen 13 bzw. 17 des Kühlfachverdampfers 11 bzw. des Null-Grad-Fach-Verdampfers 15 an die Kältemittelkanalanordnung 25 dient, so daß jeweils eine dieser Kältemittelkanalanordnungen 13 bzw. 17 in Reihenschaltung vor der Kältemittelkanalanordnung 25 liegt. Die Kältemittelkanalanordnungen 13 bzw. 17 sind zum Zweck ihrer Anbindung jeweils über einen einzügig ausgebildeten Kältemittelkanal, welcher seinerseits an den am jeweiligen Verbindungssteg 14 bzw. 19 vorgesehenen Doppelkanal anschließt an das Kältemittelkanalstück 27 herangeführt. Während im Falle des Kühlfachverdampfers 11 der im Anbindungsbereich des Verbindungssteges 14 an den Doppelkanal anschließende Kältemittelkanal zuerst den Bodenbereich 21, dann den Rückwandbereich 22 und im Anschluß daran den Deckenbereich 23 durchläuft, von wo er dann erneut in den Rückwandbereich 22 zum Anschluß an das Kältemittelkanalstück übergeht, durchläuft der im Anbindungsbereich des Verbindungssteges 19 an den dort angeordneten Doppelkanal anschließende Kältemittelkanal in einem ersten Schritt den Rückwandbereich 22, im Anschluß daran den Deckenbereich 23, von wo er dann in den Rückwandbereich 22 übergeht und im Kältemittelkanalstück 27 mündet. Dadurch, daß die Anbindung der Kältemittelkanalanordnungen 13 und 17 an die Kältemittelkanalanordnung 25 an dessen vertikal angeordneten Abschnitt im Rückwandbereich 22 erfolgt, ist verhindert, daß flüssiges Kältemittel In einen momentan aus der Kältemittelzirkulation ausgekoppelten Verdampfer strömen kann. Auf diese Weise ist sichergestellt, daß in diesem, z.B. für Abtauzwecke inaktiven Verdampfer, keine durch einströmendes flüssiges Kältemittel hervorgerufene Störungen in Form einer ständig anwachsenden Eisbildung an der Eintrittstelle zu diesem Verdampfer auftreten. One for use in a three-temperature refrigerator, not shown certain evaporator arrangement 10 is through Pressure welding of two one-piece, immediate stacked aluminum sheet boards produced and with evaporator sections with different cooling capacities fitted. Of these, the lowest is the cooling capacity having evaporator section as a refrigerator compartment evaporator 11 executed, which on its free longer Rectangular side is provided with a connection point 12 in which is an unillustrated one serving as an injection pipe Throttle tube can be inserted. At junction 12 is followed by a refrigerant channel arrangement 13, the outlet end is designed as a double channel and along one piece connected to the refrigerator compartment evaporator 11 Connecting web 14 runs. This is his mechanical fixation via holding bars, not shown on a trained as a zero degree compartment evaporator 15 Evaporator section coupled. The freezer compartment evaporator 15 points to the refrigerator compartment evaporator 11 Section side on a junction 16, which like that of the refrigerator compartment evaporator 11 for insertion for as Injection tube used, not shown Throttle tube is used, which means in the connection point a solder joint is set pressure-tight. With the junction 16 is one in turns over the heat exchange_ Area of the zero-degree compartment evaporator-running refrigerant channel arrangement 17 connected, the outlet end branches into a double channel 18, which runs along a integrally connected to the zero degree compartment evaporator 15 Connecting web 19 runs. This is like that Connecting web 14 in one piece with an adjacent to the serving as a zero-degree compartment evaporator 15 evaporator section arranged evaporator section connected, which has the highest cooling capacity. This evaporator section is designed as a freezer compartment evaporator 20 and in its ready-to-install shape [-shaped. Of the Freezer compartment evaporator 20 has a bottom section 21, one Rear wall section 22 and a ceiling section 23, which serve as heat exchange surfaces, being in the ceiling section 23 an injection point 24 is provided, which generated by embossing a throttle tube, not shown is. The injection point 24 is fluidly connected one over most of its length refrigerant channel laid in turns, which is located in one train continuously across the three areas of the freezer evaporator 20 extends and which its refrigerant channel arrangement 25 forms. This is in the range of yours Refrigerant inflow via the injection point 24, in the installed position the evaporator arrangement 10 arranged vertically Rear wall area 22 with an inflow opening Provide connection point 26. The junction 26 is opposite to the direction of refrigerant flow generated by the compressor upstream of a refrigerant channel piece 27, which for fluidic connection of the refrigerant channel arrangements 13 or 17 of the refrigerator compartment evaporator 11 or Zero degree compartment evaporator 15 to the refrigerant channel arrangement 25 is used so that one of these refrigerant channel arrangements 13 or 17 in series connection in front of the refrigerant channel arrangement 25 lies. The refrigerant channel arrangements 13 and 17 are each for the purpose of connecting them unique refrigerant channel, which in turn to the provided on the respective connecting web 14 or 19 Double duct connects to the refrigerant duct piece 27. While in the case of the refrigerator compartment evaporator 11 the in the connection area of the connecting web 14 to the double channel subsequent refrigerant duct first the floor area 21, then the rear wall area 22 and then the Ceiling area 23 passes from where it then again in the Rear wall area 22 for connection to the refrigerant duct piece passes over, runs through in the connection area of the connecting web 19 adjoining the double channel arranged there Refrigerant duct in a first step Rear wall area 22, followed by ceiling area 23, from where it then merges into the rear wall area 22 and in Refrigerant duct piece 27 opens out. Because the connection of the refrigerant channel arrangements 13 and 17 to the refrigerant channel arrangement 25 at its vertically arranged section takes place in the rear wall area 22, is prevented liquid refrigerant in one currently from the refrigerant circulation uncoupled evaporator can flow. To this This ensures that in this, e.g. for defrosting purposes inactive evaporators, none due to the inflowing liquid Malfunctions caused in the form of a refrigerant constantly increasing ice formation at the entry point this evaporator occur.

Zur Steuerung des Kältemittel-Zuflusses zu den Einspritzstellen 12, 16 und 24 der Verdampfer 11, 15 und 20 sind nicht dargestellte, elektrisch ansteuerbare 3/2-Wege-Magnetventile vorgesehen, welche entsprechend dem Kältebedarf aus den Kältefächern angesteuert sind. Das über die Einspritzstellen 12, 16 und 24 den Kältemittelkanalanordnungen 13, 17 und 25 der Verdampfer 11, 15 und 20 zugeführte Kältemittel wird im gasförmigen Zustand über eine einzige, in Kältemittelflußrichtung vor der Einspritzstelle 24 im Deckenbereich 23 angeordnete Saugstelle 28 abgesaugt, welche zu diesem Zweck über ein nicht dargestelltes Saugrohr mit dem Kältemittelverdichter verbunden ist.To control the inflow of refrigerant to the injection points 12, 16 and 24 of the evaporators 11, 15 and 20 Not shown, electrically controllable 3/2-way solenoid valves provided, which according to the cooling demand the cold compartments are controlled. That about the injection points 12, 16 and 24 the refrigerant channel arrangements 13, 17 and 25 of the evaporators 11, 15 and 20 supplied refrigerant is in the gaseous state via a single, in the refrigerant flow direction in front of the injection point 24 in the ceiling area 23 arranged suction point 28, which to this Purpose via a suction pipe, not shown, with the refrigerant compressor connected is.

Anstelle des [-förmig ausgebildeten Gefrierfachverdampfers 20 kann ein solcher, wie der Kühlfachverdampfer 11 und der Null-Grad-Fach-Verdampfer 15, lediglich als ebene Platinenfläche ausgebildet sein.Instead of the [-shaped freezer compartment evaporator 20 can be such as the refrigerator compartment evaporator 11 and Zero degree compartment evaporator 15, only as a flat board surface be trained.

Claims (6)

  1. Evaporator arrangement (10), especially for compressor-driven domestic refrigerators, with at least two flow-engineered, plate-shaped evaporator sections (11, 15, 20) which are connected together in series, have a different coldness output and the refrigerant channel arrangement (13, 17, 25) of which can be loaded, controlled by control elements, with refrigerant which is conveyed by a refrigerant compressor and which is fed to the evaporator sections by way of injection locations (12, 16, 24) associated with the respective evaporator sections and conducted away by way of a suction line (28) common to the evaporator sections (11, 15, 20), characterised in that the evaporator section (20) of higher coldness output has in the inflow end region of its refrigerant channel arrangement (25) at least an approximately vertically arranged portion equipped with a connecting point (26), which serves for connecting the evaporator sections (11, 15) in terms of flow and which is provided in a portion, which is arranged to go down monotonically, of the refrigerant channel arrangement (25) of the evaporator section (20) of higher coldness output.
  2. Evaporator arrangement according to claim 1, characterised in that three evaporator sections (11, 15, 20) are provided, of which one has a higher coldness output than the two others and is connected downstream of each of the other evaporator sections (11, 15) serially in terms of coldness, wherein the two evaporator sections (11, 15) of lesser coldness output are connected in terms of flow with the evaporator section (20) of higher coldness output by a single connecting point (26).
  3. Evaporator arrangement according to one of claims 1 and 2, characterised in that mounted in front of the connecting point (26) oppositely to the flow direction of the refrigerant is a refrigerant channel piece (27) in which the refrigerant flow from each refrigerant channel arrangement of the evaporator sections (11, 15) of lesser coldness output is combined and fed into the connecting point (26).
  4. Evaporator arrangement according to one of claims 1 to 3, characterised in that the evaporator section (20) of higher coldness output is executed as a freezer compartment evaporator (20) which is constructed in C-shape, has a base region (21), a back wall region (22) and a roof region (23) and in which the connecting point (26) is arranged within the back wall region (22).
  5. Evaporator arrangement according to claim 4, characterised in that refrigerant channels, which are led to the connecting point (26), of the evaporator sections (11, 14) of lesser coldness output are guided out of the roof region (23) over to the back wall region (22).
  6. Evaporator arrangement according to one of claims 1 to 5, characterised in that the evaporator section (20) of higher coldness output and the evaporator sections (11, 15) of lesser coldness output are arranged within an integrally formed evaporator plate (10), and that each of the evaporator sections (11, 15, 20) is provided within the evaporator plate (10) with an injection point (12, 16, 24) provided at its heat exchange surface.
EP96101060A 1995-03-16 1996-01-25 Evaporator arrangement especially for compressor driven domestic refrigerators Expired - Lifetime EP0732553B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29504538U 1995-03-16
DE29504538U DE29504538U1 (en) 1995-03-16 1995-03-16 Evaporator arrangement, in particular compressor-operated household refrigeration devices

Publications (3)

Publication Number Publication Date
EP0732553A2 EP0732553A2 (en) 1996-09-18
EP0732553A3 EP0732553A3 (en) 1996-10-02
EP0732553B1 true EP0732553B1 (en) 1999-08-04

Family

ID=8005468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96101060A Expired - Lifetime EP0732553B1 (en) 1995-03-16 1996-01-25 Evaporator arrangement especially for compressor driven domestic refrigerators

Country Status (4)

Country Link
EP (1) EP0732553B1 (en)
DE (2) DE29504538U1 (en)
ES (1) ES2137572T3 (en)
TR (1) TR199600138A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19509571A1 (en) * 1995-03-16 1996-09-19 Bosch Siemens Hausgeraete Evaporators, in particular for compressor-operated household refrigeration devices
DE29716572U1 (en) * 1997-09-15 1997-12-04 Liebherr Hausgeraete Refrigerator with a normal cold room and a freezer compartment
DE19818288B4 (en) * 1998-04-23 2009-04-30 BSH Bosch und Siemens Hausgeräte GmbH cooling unit
DE102011013371A1 (en) * 2011-03-09 2012-09-13 Liebherr-Hausgeräte Ochsenhausen GmbH Cooling and/or freezing device for use in e.g. household area, has cooling medium circuit comprising heat exchanger that has channel structure with set of channels and branches, where one of channels is divided into partial channels

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3224452A1 (en) * 1982-06-30 1984-01-05 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Household refrigerator, especially two-temperature, single-circuit refrigerator
DE3804863A1 (en) * 1988-02-17 1989-08-31 Schmoele Metall R & G Cooling plate for a refrigerator
DE9115640U1 (en) * 1991-12-17 1992-02-13 Bosch-Siemens Hausgeraete Gmbh, 8000 Muenchen, De
DE4141641A1 (en) * 1991-12-17 1993-06-24 Bosch Siemens Hausgeraete SECOND TEMPERATURE REFRIGERATOR

Also Published As

Publication number Publication date
DE29504538U1 (en) 1995-05-18
EP0732553A2 (en) 1996-09-18
TR199600138A2 (en) 1996-10-21
DE59602582D1 (en) 1999-09-09
EP0732553A3 (en) 1996-10-02
ES2137572T3 (en) 1999-12-16

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